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9L0-621 - Mac OS X Advanced System Administration v10.5 - BrainDump Information

Vendor Name : Apple
Exam Code : 9L0-621
Exam Name : Mac OS X Advanced System Administration v10.5
Questions and Answers : 105 Q & A
Updated On : January 21, 2019
PDF Download Mirror : 9L0-621 Braindumps
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9L0-621 exam Dumps Source : Mac OS X Advanced System Administration v10.5

Test Code : 9L0-621
Test Name : Mac OS X Advanced System Administration v10.5
Vendor Name : Apple
Q&A : 105 Real Questions

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Apple Apple Mac OS X

what's Mac OS? execs and Cons | clarification | killexams.com Real Questions and Pass4sure dumps

“Apple” the most advantageous brand on this planet produces some of the most useful Hardware & software items and Mac OS is just one of them.

if you don’t understand what is it? you then came at appropriate location as a result of right here, in this article, we're offering you with everything you should learn about MacOs.

also study – MacOS vs home windows vs Linux: Which one is enhanced?

what's Mac Os?

The term Mac OS stands for Macintosh operating device.

It’s a UNIX based mostly working equipment via Apple, solely for MacBooks and iMacs.

in the market of desktops, Laptops, and residential computers it’s the 2nd most standard desktop OS after windows.

quick background of Mac Os

After the departure of Steve Jobs from Apple, the company suffered a tremendous loss and board of directors at Apple determined to bring Steve returned from next and lead the enterprise on an intervening time basis.

At WWDC (all over the world Developer’s conference) when Steve announced that developers definitely desire a contemporary version of the Mac OS, and Apple goes to carry it, then he received a major round of applause from the viewers.

This in reality made Steve and his team work harder on Mac Os and soon they proved that Apple truly has a possible.

the primary preliminary release of Mac Os became on March 24, 2001, which is almost 17 years in the past from now.

And till now Mac OS is improving with each new unlock.

Myths regarding Mac Os 1. Mac OS is extra comfortable than home windows

lots of you may have heard that Mac Os is extra at ease than windows. but that’s not real.

The market share of Mac is under 10% which consequences in less malware and adware assaults.

in reality, the leading intent at the back of here's iMac and Macbook.

These two items operating on Mac OS which is a little bit expensive as in comparison to windows. So this immediately consequences in less harm.

additionally study– Why real hackers pick Linux over home windows and Mac

2. Mac is constructed for Artists

Mac Os comes with a lot of developed-in artistic and constructive tools as in comparison to windows.

for example, iMovie and ultimate reduce professional increases the journey of video enhancing.

however that doesn’t mean that windows are dangerous.

you can separately download the third party application comparable to Adobe most advantageous or Adobe After results for a more robust event.

Doing this on home windows workstation will prevent loads of hard earned cash.

three. totally costly

yes working a Mac OS gadget might also sound expensive but that’s no longer utterly real.

The cost of materials utilized in making iMac and MacBook is additionally very excessive.

due to this fact, a person finally ends up with a fantastic product with optimum sturdiness in terms of each hardware and application.

Apple also spends billions of bucks in R&D (analysis and development) which besides the fact that children included in the charge of the product.

4. hard to gain knowledge of and Use

here's probably the most denied delusion by using any Mac consumer because Mac OS feels a whole lot greater convenient to gain knowledge of and function as in comparison with some other operating gadget.

It has a really user-friendly user interface.

And additionally draws everybody’s consideration as it is completely stacked and organized as in comparison with windows.

5. No want of Antiviruses for Mac

As we outlined prior attackers goal Mac OS devices very less compared with home windows.

however it doesn’t imply that you just don’t should install any antiviruses on it.

Don’t be fooled through fewer assaults.

As we always hear within the news that some malware attacked on Mac OS. So It’s superior to be equipped with protection.

pros and Cons of Mac Os

Following are one of the vital pros (advantages) and Cons (hazards) of Mac OS.

pros 1. BootCamp

Mac OS has a constructed-in software referred to as BootCamp.

It means that you can installation home windows, Linux or another operating device moreover OS X.

developing the boot camp in OS X is additionally very convenient.

And switching between them is even easier now.

2. Works seamlessly with different Apple devices

As every Apple gadget is made with the aid of Apple itself so the hardware and utility are absolutely managed through them.

It skill they share the same internal working mechanism.

which implies that the iMessage on iPhone works as clean as on a MacBook or iMac.

This seamless integration of devices in the end delivers the most reliable consumer journey and satisfaction.

three. Fewer assaults

As we mentioned prior Apple has handiest 10% of market share within the desktop OS, which consequences in fewer assaults.

The volume of Mac clients are pretty much less as in comparison to home windows.

So this doesn’t make any sense for hackers to assault Mac OS clients.

here is someway can also be an talents for some americans because it makes the user feel Mac Os extra relaxed but will also be an obstacle for some others because at the identical time it is not as a great deal conventional because the windows.

4. Bloatware Free

virtually each home windows workstation comes with some type of Bloatware (Pre-put in utility) which slows down the workstation over time.

however Macbook and iMac makes you free from this fret.

It doesn’t suggest that they don’t include Pre-installed application.

Mac computer systems have pre-put in application, but simplest from Apple and that they don’t decelerate your device as neatly.

5. staggering sleek Design

The largest talents of Macbook and iMac is that they're swish as in comparison to their competitors.

This makes using Mac OS extra exciting.

As a rely of fact, the primary MacBook air changed into the slimmest computer on earth at the moment.

And iMac nevertheless remains the slimmest computing device version.

6. Mac can study NTFS or fats

Macs can read NTFS or fat formatted complicated drives whereas home windows can’t read Mac formatted drives.

You deserve to deploy third-birthday celebration application for that in home windows.

7. superior client carrier and After earnings assist

Apple is awfully smartly sought after for it’s most fulfilling consumer service and after earnings support.

they have got the highest client delight mark all around the globe.

The team of workers on outlets are smartly trained and in case you bought your gadget broken they be certain that they provide you with the very best solution.

also read – right 5 factors for Apple’s Success

Cons 1. much less variety and alternate options

The greatest disadvantage of Mac OS or we may still say MacBook and iMac is that Apple presents very constrained variations of them.

potential you deserve to spend the determined volume through them, only then you should buy their product otherwise not.

This makes windows a go-to option for those who are seeking for some inexpensive laptop or computing device as a result of a wide selection of alternative.

This element restricts the buyer from deciding to buy Apple Mac Product.

2. Non-upgradable

an additional main drawback of Mac OS powered items is that they are non-upgradable.

skill that you may’t raise the amount of RAM, trade processor or motherboard, basically, you could’t personalize it based on you.

once you acquired it, you have to adjust on what you bought.

three. Worse for enjoying video games

Many people trust so that you can’t play excessive-end video games on Macbook and iMac which is somehow authentic.

each of those products are not made for gaming.

they've a really less amount of pics memory which isn't ample for most effective gaming performance.

so that you must hand over on this.

4. Fewer add-ons

because it is not as widespread as windows PCs.

The MacBook and iMac have to endure from fewer add-ons.

There are very less quantity of add-ons producers who create add-ons for them.

This additionally effects on what may well be the expertise patrons of Mac.

5. Small community

as a result of fewer income, the MacBook and iMac people have a very small neighborhood as in comparison to home windows users.

Which capacity you received’t benefit from the aid as a whole lot you may on home windows notebook.

Conclusion

So this was all involving what's Mac Os? their execs and Cons and clarification. in case you discover it constructive then do tell us within the remark section below, we would love to hear that.

live tuned for extra.


Continental pronounces Apple OS compatibility for VDO RoadLog ELD | killexams.com Real Questions and Pass4sure dumps

Continental has introduced that its VDO RoadLog workplace Solo digital Logging device (ELD) utility is now suitable with Apple computer systems and laptops. VDO RoadLog Solo valued clientele can now operate USB key synchronization on up to date Apple computer systems and laptops having macOS Sierra (edition 10.12 or larger), Apple computing device’s Mac OS X operating system for Macintosh laptop, desktop, and server computer systems. The client’s computer or laptop ought to also have an accessible USB port and broadband internet entry.

“Many proprietor/operators and fleets have an interest in synchronization to Apple computer systems and laptops, and we are now able to offer an easy manner for them to connect these contraptions,” stated Jay McCarthy, Continental’s VDO RoadLog advertising manager. “for those who may be the use of other ELDs, here's yet one more reason to make the swap to the VDO RoadLog ELD solution.”


OS X/macOS now older than basic Mac OS | killexams.com Real Questions and Pass4sure dumps

Older readers may nonetheless bear in mind when Macs made the transition to OS X, extra recently rebranded to macOS. but when you nonetheless type of consider of that as the ‘new’ OS, as of these days it’s in reality now been around for longer than all of the preceding versions – mutually and colloquially called traditional Mac OS …

Jason Snell marked the occasion in a blog put up the day past.

these days marks 17 years, one month, and 29 days considering that Mac OS X 10.0 changed into released on March 24, 2001. That’s a surprisingly ordinary number—6,269 days—nevertheless it additionally happens to be the actual length of time between January 24, 1984 (the launch of the common Macintosh) and March 24, 2001.

In different phrases, today the Mac’s 2nd operating system era, powered by Mac OS X (now macOS) has been in existence so long as the primary period become.

As he notes, it does rely just a little on the way you measure these items.

There changed into a Mac OS X public beta. The funeral for Mac OS 9 wasn’t held except 2002. traditional Mode endured to function inside Mac OS X unless it turned into eliminated in Mac OS X 10.5 Leopard.

So for beta users, the milestone may additionally were passed a while returned, and for people that held onto Mac OS 9 for a while after OS X launched, it can no longer yet have arrived.

Early models of the Macintosh system application had no respectable identify, with Apple referring only to Macintosh Toolbox ROM and the equipment Folder. It handiest grew to be Macintosh gadget application in 1987, with what turned into then known as device 5. Apple rebranded it to Mac OS in 1996, at device 7.6.

As to the future, Snell says that he doesn’t see a ‘seismic’ shift any time quickly, extra a gradual increase within the borrowing from iOS. but he does well known that a new chip might see the process occur in every single place once again.

there was continued speculation about Apple switching from Intel to ARM chips for future Macs, with one contemporary record suggesting it may take place as soon as 2020. I gave my own view on that thought, concluding that the date could seem not going, however that it is coming quickly.

that you could download the entire default wallpapers in 5K from 512 Pixels.

by way of Daring Fireball. photo: 512 Pixels

try 9to5Mac on YouTube for more Apple news:




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9L0-621 exam Dumps Source : Mac OS X Advanced System Administration v10.5

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Mac OS X Advanced System Administration v10.5

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Five Ways to Reset a Lost Administrator Password | killexams.com real questions and Pass4sure dumps

This article is over four years old and some details have changed. For up-to-date help, read “Three Ways to Reset a Lost Admin Password in High Sierra” (5 July 2018).

Several years ago, I was helping a client upgrade her Mac running Mac OS X 10.5 Leopard, but she couldn’t remember her administrator password. Because she also couldn’t find the original system CDs that shipped with her iMac, I had to resort to some advanced techniques few home users would ever be able to figure out.

Starting with 10.7 Lion, you could still call on all those options, but Apple added a method so easy that even an inexperienced user can do it — the Apple ID-based password reset. Let’s explore all the options to reset a password. Which you should use depends on the specific version of Mac OS X, and how the Mac is set up.

But first, there’s an important caveat about any of these methods, related to the login keychain.

Reset Login Keychain Password — No matter which of these methods you use to reset a forgotten administrator password, it won’t update the password protecting the account’s login keychain, which stores all of the user’s passwords. Since the keychain is protected by the now-forgotten administrator password, there’s no way to get back into it. Newer versions of Mac OS X may prompt about this problem at startup; otherwise you’ll need to delete the keychain and start it over again, using these steps:

  • Open Keychain Access from /Applications/Utilities, and choose Keychain Access > Preferences (Command-,).
  • In newer versions of Mac OS X, you’ll see a button labeled Reset My Default Keychain in the General pane. If you have that button, click it to remove the old keychain and create a new one with the new password.
  • If that button is not present, choose Edit > Keychain List (Command-Option-L), select the login keychain, and click the minus button to delete it.
  • Quit Keychain Access and restart the Mac. A new login keychain will start collecting and storing the passwords for Wi-Fi networks, email accounts, Web sites, and other logins as they occur.
  • If you can’t work with Keychain Access because of something like Messages Agent constantly asking for the forgotten login keychain password, you’ll have to resort to the command line, with these steps:

  • Reboot into Single User mode by restarting the Mac and holding Command-S while the system comes back up. Numerous lines of status messages will scroll by.
  • Once you have a command-line prompt, enter this command to mount the root Mac OS X drive as writable, so you can make changes to the filesystem:mount -uw /
  • Figure out the shortname of the account you want to reset by looking through the list that results from typing this command:ls /Users
  • Now enter this command to delete that account’s login keychain, replacing shortname appropriately:rm /Users/shortname/Library/Keychains/login.keychain
  • Restart the Mac by typing:reboot
  • When the Mac comes back up, Mac OS X should create a new login keychain.

    Now let’s move on to resetting the password!

    1: Use the Command Line — In early versions of Mac OS X, the command line was the best way to reset a forgotten administrator password. Even now, command-line password reset remains available, making it the most universal approach that will work in any situation. If you’re not turned off by typing highly specific commands, follow these steps:

  • Make a note of the user account shortname by opening the Home folder (in the Finder, choose Go > Home) and checking the folder name at the top of the window. If you can’t get into the account at all, you can determine the shortname later on.
  • Reboot into Single User mode by restarting the Mac and holding Command-S while the system comes back up. A lot of arcane status messages scroll by, and leave you with a command-line prompt.
  • Mount the root Mac OS X drive as writable, so you can make changes to the filesystem, with this command:mount -uw /
  • For those running 10.7 Lion, 10.8 Mountain Lion, or 10.9 Mavericks, enter this command at the prompt to load Open Directory (which manages user accounts) manually, since it was deprecated in Lion:launchctl load /System/Library/LaunchDaemons/com.apple.opendirectoryd.plistSkip this step if you’re running 10.6 Snow Leopard or earlier.
  • If you don’t know the shortname of the account you want to reset, look through the list that results from typing this command:ls /Users
  • Next, enter the following command, replacing “shortname” with the desired account’s shortname:dscl . -passwd /Users/shortnameIf you get this error message, you may ignore it:launchctl: Couldn’t stat (“/System/Library/LaunchDaemons/com.apple.DirectoryServicesLocal.plist”): No such file or directory nothing found to load
  • Type in the new password.
  • Restart the Mac by typing:reboot
  • 2: Use One Account to Reset Another — Since 10.4 Tiger, if a Mac had multiple administrator accounts, you could log into one account to reset the password in another. This remains possible, and is one of the reasons that many people who are responsible for the Macs of less-experienced users will often create a separate administrator-level account for troubleshooting. Here are the steps you need to follow to use this approach, assuming you have the necessary access:

  • While logged in an administrator account in which you know the password, open the Users & Groups pane of System Preferences (it was called Accounts before 10.7 Lion).
  • Select the name of the user whose password you want to change, and click the Reset Password button. (You may need to click the lock icon in the lower left of the window and enter an administrator password to be able to make changes.)
  • Enter the new password, the same password again for verification, and a hint in case it’s forgotten again.
  • 3: Use the Installer CD or DVD — Up through 10.6 Snow Leopard, if the Mac had only the original administrator account, and resetting the password via the command line was too scary, you could use the original Mac OS X Install disc instead. (Actual snow leopards may be endangered, but installer discs went extinct with 10.7 Lion, so this method is only for older Macs.) Here’s how:

  • With the Mac turned off, power it up, insert the disc immediately, and hold down the C key to make the Mac boot from the disc’s version of Mac OS X.
  • From the Utilities menu at the top of the screen (or the Installer menu in 10.3 Panther), choose Reset Password.
  • Select the hard disk volume, and the name of the original administrator account. (Stay away from the Root account.)
  • Enter the new password, and then click Save.
  • Quit the Mac OS X Installer, and restart the Mac normally.
  • Apple provides a support document with more details, along with instructions for Mac OS X 10.1 through 10.3, should you run into such an ancient setup.

    4: Use the Recovery Partition — Starting with 10.7 Lion, which was sold only through the Mac App Store, the installer disc was replaced by the Recovery partition, a small chunk of the boot disk that contains a stripped-down version of Mac OS X and essential utilities. To reset the administrator password when running Lion or later:

  • Restart the Mac while holding down the Option key, and double-click the icon for the Recovery partition. A Mac OS X Utilities screen appears.
  • Choose Utilities > Terminal.
  • In Terminal, type resetpassword. Rather unusually for a task performed from the command line, a graphical Reset Password window appears.
  • Select the startup volume at the top of the window, and then choose a user account from the pop-up menu. In the fields below, enter the new password, confirm it, and add an appropriate hint.
  • Click Save, and then choose Restart from the Apple menu.
  • 5: Use Your Apple ID — Starting with 10.7 Lion, it also became possible to use your Apple ID to reset your administrator password. It’s turned on by default in the Users & Groups pane of System Preferences, but double-check to make sure.

    When this feature is active, if you enter the administrator password incorrectly at the login window three times, a popover appears with the password hint and a message saying “If you forgot your password, you can reset it using your Apple ID.” Here’s how to do that:

  • Click the arrow icon to open the Reset Password dialog.
  • Enter your Apple ID and its password, then click Reset Password to proceed.
  • Enter a new administrator password, verify it, and fill in the Hint field so that you’ll get a memory trigger the next time you forget.
  • Click Reset Password, and you’re done.
  • If you’ve also forgotten your Apple ID password, you can reset that at Apple’s My Apple ID page. Doing so relies on having access to the email address associated with your Apple ID; if that email account could be compromised, allowing the administrator password to be reset by the Apple ID might provide a way that the physical security of your Mac could be attacked. If you’re really worried, turn the feature off in the Users & Groups preference pane.

    One quirk. If you upgraded from 10.6 Snow Leopard to 10.7 Lion, you may not get the reset message after three incorrect attempts. To fix this problem while you can still access the account, open the Users & Groups preference pane, delete the affected Apple ID, and then add the same Apple ID back.

    It’s also important to know that encrypting your Mac’s boot disk with FileVault 2 prevents you from using your Apple ID to reset your password (since the password is used in FileVault’s encryption). Read this Apple support document for more information about FileVault.

    No Excuse for a Lost Password — Regardless of how or why an administrator password has been lost or forgotten, there are a variety of techniques that you can use to reset it and regain full access to a Mac. These techniques aren’t to be used willy-nilly, since the login keychain will be lost in the process, but whether the simple method of using an Apple ID is sufficient or you need to drop down to the command line, you should be able to get the access you need.


    New open-source app extracts passwords stored in Mac OS X keychain | killexams.com real questions and Pass4sure dumps

    New open-source app extracts passwords stored in Mac OS X keychainJuuso Salonen reader comments 135 with 54 posters participating, including story author Share this story
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  • A software developer has released an open-source app for the Mac that, when run with administrator privileges, dumps all the passwords belonging to other people currently logged on to the machine.

    Within hours of the release of Keychaindump by Helsinki-based Juuso Salonen, other Mac experts were downplaying its significance. "News flash, root can also format your hard drive, news at 11," OS X serial hacker Charlie Miller wrote on Twitter, referring to the "root" account that by definition has unfettered privileges in operating systems. "Root is totally a dick, he stole my prom date in high school!" another exploit developer known as thegrugq responded.

    Their point is that the Keychaindump's ability to root out passwords isn't a vulnerability or even an oversight by Apple engineers. It's a necessary design with parallels that can be found in any advanced operating system, including Microsoft Windows and various distributions of Linux. Labeling it as a "bug" or a "vulnerability" is like claiming a meat slicer is flawed because it can saw through the finger of the person using it.

    That said, Salonen's software and an accompanying blog post appear to be the first time anyone has documented the inner workings of the widely used Mac Keychain and released attack code built on those findings. Salonen says his app is "far from perfect," but he also says it "seems to work well" at scouring the internal memory of Macs for the passcodes all currently logged-in account owners enter to access passwords stored on their personal keychains. And that includes the passcode for the root user.

    "If I'm writing a virus, I will use this code," said Rob Graham, who as CEO of penetration testing firm Errata Security regularly writes software exploits to test the security of his clients. "We've always known it's possible. It's just a matter of someone actually writing code for that part of the keychain."

    One application for such code would be for malware writers who want to collect as much information as possible on the people using a targeted Mac. By dumping the entire contents of a user's keychain, the passwords for virtually every WiFi network, e-mail account, and website account are quickly in the hands of the attacker. With the rise of the Flashback malware that infected an estimated 650,000 Macs or new strains of Mac-based espionage trojans targeting Chinese dissidents, it's not hard to imagine code like Salonen's being employed to give them powerful new capabilities.

    What's more, the password extraction method is significantly faster than attempting to brute-force crack a strong account password. That's because OS X stores account passwords using the PBK2F2 key derivation function, which, as Ars recently explained, was designed to thwart cracking attacks by requiring large amounts of time and computing resources to convert plaintext into cryptographic hashes.

    "Encrypted many times over," in "Russian-doll fashion"

    According to Salonen, keychain files are "encrypted many times over" in a fashion similar to the way one Russian doll fits inside the next. The OS X system uses a variety of keys, including one derived from the account password belonging to the user who owns the password keychain. Once a user has unlocked that list, the password is converted into a 24-byte master key and stored in a part of computer memory reserved for a security process known as "securityd." With a little more research, the developer found a common structure in this memory region that points to the master key. It contains an 8-byte size field with the value of "0x18 (24 in hex)."

    Keychaindump uses what's known as pattern recognition to search for the pointer and then test the following value to see if it's a master key. A Master key will reveal an intermediate key called a "wrapping key." Using a hard-coded "obfuscation key," the wrapping key in turn reveals an encrypted "credential key," which, at last, reveals the user's plaintext password. Salonen credited fellow developer Matt Johnston for the research into the decryption steps.

    Running the code produced the following output, where actual passwords and usernames were replaced with x's:

    $ sudo ./keychaindump [*] Searching process 15 heap range 0x7fa809400000-0x7fa809500000 [*] Searching process 15 heap range 0x7fa809500000-0x7fa809600000 [*] Searching process 15 heap range 0x7fa809600000-0x7fa809700000 [*] Searching process 15 heap range 0x7fa80a900000-0x7fa80ac00000 [*] Found 17 master key candidates [*] Trying to decrypt wrapping key in /Users/juusosalonen/Library/Keychains/login.keychain [*] Trying master key candidate: b49ad51a672bd4be55a4eb4efdb90b242a5f262ba80a95df [*] Trying master key candidate: 22b8aa80fa0700605f53994940fcfe9acc44eb1f4587f1ac [*] Trying master key candidate: 1d7aa80fa0700f002005043210074b877579996d09b70000 [*] Trying master key candidate: a0a20000000200f7474d400000700d01a980fa00007f085e [*] Trying master key candidate: 180000000000000000000000000000000000000007000001 [*] Trying master key candidate: 0000b107000001000000803e970aa8710ae567eff7ff0000 [*] Trying master key candidate: 796a63507e6c2a84d9f095fae2896058dfe029cd0f7105da [*] Trying master key candidate: 16ac866d636215c01e337e942f48cfed12d7c45bfab8dbf7 [*] Trying master key candidate: 070020539baab0d1d6a3aa80fa006877ed57f80fa0000000 [*] Trying master key candidate: 88edbaf22819a8eeb8e9b75120c0775de8a4d7da842d4a4a [+] Found master key: 88edbaf22819a8eeb8e9b75120c0775de8a4d7da842d4a4a [+] Found wrapping key: e9acc39947f1996df940fceb1f458ac74b877579f54409b7 xxxxxxx:192.168.1.1:xxxxxxx xxxxxxx:news.ycombinator.com:xxxxxxx xxxxxxx@gmail.com:login.facebook.com:xxxxxxx xxxxxxx@gmail.com:smtp.google.com:xxxxxxx xxxxxxx@gmail.com:imap.google.com:xxxxxxx xxxxxxx@gmail.com:api.heroku.com:xxxxxxx xxxxxxx:www.freechess.org:xxxxxxx xxxxxxx:twitter.com:xxxxxxx xxxxxxx@gmail.com:www.google.com:xxxxxxx xxxxxxx:imap.gmail.com:xxxxxxx ...

    As we made clear earlier in this post, there's no vulnerability here. Aside from following longstanding security advice to use lower-privileged accounts whenever possible and log out of those accounts when they're not in use, there's not much anyone can do to prevent these types of attacks. Update: Salonen points out in his blog post users can take additional steps to lock and unlock their keychain; Apple has more here.

    None of this, however, means Salonen's app, which runs on OS X Lion and Mountain Lion, isn't of value, either to black-hat hackers or the white-hats who work to stop them.

    Post updated to add sentence about locking and unlocking keychain.


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