Run disk utility mac from single user mode
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- #RUN DISK UTILITY MAC FROM SINGLE USER MODE MAC OS#
- #RUN DISK UTILITY MAC FROM SINGLE USER MODE INSTALL#
- #RUN DISK UTILITY MAC FROM SINGLE USER MODE PORTABLE#
(AppleJack also provides its own man file, accessible by typing man applejack in single-user mode.) You can then use memtest from within AppleJack’s Expert mode, noted below.
#RUN DISK UTILITY MAC FROM SINGLE USER MODE INSTALL#
For example, when installing AppleJack, clicking on the Customize button lets you also install memtest 4.14 ( ), a command-line program that tests your Mac’s RAM more-thoroughly that Apple’s own Hardware Test. The ReadMe also includes some great tips. In fact, it’s a good idea to print out the ReadMe and keep it on hand for troubleshooting emergencies. I highly recommend reading the ReadMe file included with the AppleJack installer, as it contains lots of useful-and important-information, including known issues and explanations of confusing messages produced by single-user mode.
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#RUN DISK UTILITY MAC FROM SINGLE USER MODE PORTABLE#
AppleJack is especially useful for MacBook Air owners, given that Apple’s slimmest portable doesn’t have a built-in optical drive.
#RUN DISK UTILITY MAC FROM SINGLE USER MODE MAC OS#
The beauty of AppleJack is that it lets you easily perform such troubleshooting tasks when a problem is preventing your Mac from booting into Mac OS X, even if you don’t have an OS X Install disc or a third-party bootable disc handy. Of course, many of AppleJack’s tasks can be performed when your Mac is booted normally, either manually, using Disk Utility, or using a third-party utility. Finally, when you perform tasks separately, you get additional options for example, the Cleanup Cache Files and Validate Preference Files tasks let you perform their actions on particular user accounts. Running the Repair Disks task separately lets you repeat the procedure until you no longer see the “Your disk was modified” message. Second, and perhaps more important, fsck-used by the Repair Disks task-may need to be run multiple times to fully repair your drive. First, as I noted in my Five Mac Maintenance Myths article, performing all of these tasks is usually overkill a better approach, in my opinion, is to perform them in order, restarting after each to see if it fixed the problem. The developer recommends this mode only if the standard auto procedure doesn’t fix enough problems to let your Mac boot properly.Īlthough auto mode can be convenient, I rarely use it, for a few reasons. If you instead type AUTO (all uppercase), AppleJack goes into “deep clean” mode, which means it deletes all system cache files, including the LaunchServices database. You can choose to run all these tasks in one fell swoop, in order, by typing auto (all lowercase) and pressing return.
![run disk utility mac from single user mode run disk utility mac from single user mode](https://i.stack.imgur.com/VmNSq.png)
Finally, Clean Up Virtual Memory manually deletes any virtual-memory swap files that weren’t cleaned up automatically by the OS. Validate Preference Files checks preference files for possible corruption those that don’t pass muster are moved to a new “Preferences (Corrupt)” folder in the same parent Library folder as the originals. Cleanup Cache Files removes temporary cache files in case a corrupt cache is the cause of your problems. Repair Permissions is identical to using Disk Utility’s Repair Disk Permissions function (except it takes a bit longer in single-user mode). Repair Disks uses OS X’s built in fsck program-the same one used by Disk Utility-to examine and, if necessary, repair minor damage to your startup drive’s directory. Doing so brings up a textual menu of options, shown below you simply type the desired number or letter and press return to perform that task. Just below the standard “If you want to make modifications to files” message, you see a new message instructing you to type applejack for troubleshooting assistance. Once installed, AppleJack is available in OS X’s single-user mode, accessed by holding down Command+S at startup. Installing AppleJack requires an admin-level user account, as it modifies OS X’s startup process and makes a minor (and safe) tweak to the root account.