Mac Os Sierra Needs To Repair Your Library

One of the old Mac OS X utilities, Disk Utility, has received a makeover in macOS Sierra. The updated app now presents a streamlined appearance while retaining all of its former functionality, and it’s still useful for verifying or repairing disks. This can be useful if you’re running into odd issues with a Mac, so we’ll take a look at the process of verifying and repairing disks with macOS Sierra’s Disk Utility.

Some of the issues you might encounter that indicate a disk that might need repair:

I get a prompt that says 'macOS needs to repair your Library to run applications' I've tried entering my network account (Which is in an admin group) and that doesn't work. I entered the local admin account I set up, that didn't work. I enabled the root account, and used that. That didn't work. Then I got creative. Mar 18, 2020  If your Photos library won't open, or if Photos behaves unexpectedly, the Photos library repair tool might resolve the issues. Follow these steps to use the Photos library repair tool: Hold down the Option and Command keys while you open Photos on your Mac. Jun 15, 2017  Hi Howard. I have a late 2012 MBP which I just upgraded to High Sierra. Everything worked fine before the upgrade, and seems to work fine after the upgrade, except I get a continual message window stating “macOS needs to repair your Library to run applications”. Sep 27, 2016  macOS Sierra problems: Here's how to fix the most common issues. But if you've just decked out your Mac with the latest operating system. 'Mac OS X needs to repair your library to run applications' prompt continues to pop up. Archived 'Mac OS X needs to repair your library to run applications' prompt continues to pop up. Hi, this prompt keeps coming up no matter how many times I enter the Admin name and password. MacOS High Sierra is no exception - Mac users have reported issues encountered immediately after upgrading to this operating system. One of the most frequent errors is a warning message stating that OS High Sierra needs to repair the library. This particular message can pop up repeatedly, whilst others, less frequently - maybe once or twice.

  • Multiple apps quit unexpectedly
  • A file is corrupted
  • An external device doesn’t work properly
  • Your Mac refuses to start up

Verifying Disks
Verifying a disk subjects it to a series of checks, all of which are done through a process called “Live Verification”. This means that Disk Utility can check the status of a disk, its catalog file, multi-linked files, catalog hierarchy and more the Mac needing to be started up with another disk drive. It does this by “freezing” the volume, so while you’re running the verification tests you may find that your Mac becomes slow or unresponsive.

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To verify a disk, simply launch Disk Utility (found in Applications > Utilities), click on the drive volume you wish to check, then click on the First Aid button in the Disk Utility toolbar. Disk Utility responds by stating what it’s about to do:

Click the blue Run button to begin the process of verifying the disk. Disk Utility informs you of what’s about to happen, specifically noting that apps will become unresponsive during the tests.

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Click the blue Continue button, and Disk Utility begins to perform its battery of tests on the hard drive. The process usually runs quickly, taking only a few minutes to verify a large (2 TB) boot drive. You’ll get a notification that the First Aid process is complete (see image below), with either a green check mark indicating that everything appears to be OK or a red X indicating that there are some issues that need to be repaired. To repair a disk, it’s necessary to boot from another drive, then run Disk Utility again. We’ll cover that in the next section of this post.

Note that the Live Verification process only works on volumes that have been formatted as “Mac OS Extended (Journaled)”. If you run First Aid on a volume that is not journaled, Disk Utility responds with an error message saying “ERROR: could not freeze volume (Operation not supported). In addition, you may not be able to interrupt the Live Verification through First Aid, so it’s best to let it continue to run until completed. Finally, an alert message that says “Incorrect size for file temp” is no cause for alarm.

Repairing a Disk
If First Aid and the Live Verification process indicate that repairs are required on a volume, it’s time to boot from another disk drive and then run Disk Utility again. Fortunately for Mac users, there’s a built-in “boot disk” in the guise of the Recovery Partition.

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Mac os sierra needs to repair your library homeMac

To boot from the Recovery Partition, restart your Mac and hold down the Option key. When the Mac restarts, you are greeted by icons for all of the available drives. In the example below, there’s a Sierra drive, a Windows drive (Boot Camp), and a drive designated “Recovery-10.12”. macOS Sierra is also known as macOS 10.12, so this is the Recovery Partition for our Sierra boot drive.

Use your mouse, trackpad, or keyboard arrow keys to highlight the “Recovery-10.12” drive, then press Return. Once the system has booted, four macOS Utilities are listed, one of which is Disk Utility (see image below). Best way to move iphoto library to new mac. Click Disk Utility to select it, then click the Continue button. The familiar Disk Utility window appears. Click on the drive requiring repairs, then click First Aid again. As before, Disk Utility will take the volume through the Live Verification process. When it finds errors on that volume, it can now repair them since you’ve booted from another disk.

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Should you require additional detail not found in this post, be sure to check these two Apple knowledge base articles:

Further reading on macOS Sierra: