Your home folder contains many files and folders that apps on your Mac have permission to read or modify. If you use Get Info or other methods to change those permissions, you could experience issues such as these:
- 2020-4-1 How to Repair Photos Library in Photos App for Mac OS X. Though repairing the library is supposed to fix problems, it’s a good idea to backup the Mac and your photos library into Time Machine, or your backup method of choice, before attempting to repair it. This is a precautionary measure just in case something happens to go wrong in the repair process.
- When you run the Repair Disk Permissions function, it examines the receipts in the /Library/Receipts directory of the disk being repaired —which means the feature works only on volumes with Mac.
- Changes that you make in System Preferences aren't saved after you quit System Preferences.
- Changes that you make to the Dock aren't saved after you log out of your user account.
- Windows that were open the last time you logged out or quit an app (before you changed permissions) open again after you log in or open the app.
- You're asked for an administrator name and password when moving certain items in the home folder.
- You repeatedly get a message that macOS needs to repair your Library to run applications.
- When saving changes to an item, you get a message that the file is locked or you don't have permission to save.
- Preview, TextEdit, or other sandboxed apps unexpectedly quit when opened.
- You get an alert that the startup disk has no more space available for application memory.
- Activity Monitor shows that Safari or SafariDAVClient is using a large amount of system resources.
- Your Mac performs slowly.
- iTunes says that your device cannot be synced.
- Photos and videos that you import into Photos or iPhoto don't appear within the app, but do appear in Finder. Or your library needs to be updated or reselected each time you open Photos or iPhoto.
Reset permissions
Jul 14, 2018 The new repair permissions only looks in your Home folder, and specifically in /Library, which is not protected by SIP and can readily have its permissions changed, which will lead to these problems. Unless you have very very good reason, you should never turn SIP off. Merge photo libraries mac mojave. Feb 26, 2018 Video showing how to fix 'macOS High Sierra needs to repair your library' error. Detailed instructions - https://www.pcrisk.com/computer-technician-blog/mac/.
If the issue started after changing the permissions of items in your home folder , use these steps to reset permissions.
- Turn on or restart your Mac, then immediately press and hold Command (⌘)-R to start up from macOS Recovery.
- You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
- When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
- Type
repairHomePermissions
in the Terminal window, then press Return. The Repair Home app opens. - Select your user account, click Next, then enter your administrator password. Click Next unlock the volume and begin resetting permissions on your home directory.
- When done, click Exit to return to the macOS Utilities window.
- Select Reinstall macOS, then click Continue and follow the onscreen instructions to reinstall macOS.
If the issue persists
Create new photos library mac sierra. If resetting permissions doesn't resolve the issue:
- Make sure that you have a backup of your Mac, then erase your startup disk.
- When done, reinstall macOS.
- After installation completes and your Mac restarts to the setup assistant, create a new user account using a different name than the one you were using before. Any difference in spelling is enough.
- If you made a Time Machine backup, use Migration Assistant to restore all your files from the backup.
Mac Repair Library Permissions Sierra Drive
Follow these steps to use the Photos library repair tool:
Macos High Sierra
- Hold down the Option and Command keys while you open Photos on your Mac.
- In the dialog that appears, click Repair to start the repair process.
You might be asked to type in your user account password to authorize the library repair.
The repair tool analyzes the the library's database and repairs any inconsistencies it detects. Depending on the size of your library, this might take some time. When the process is completed, Photos opens the library. How do i extract photos from my mac photo library.
If you repair a library that's automatically updated with iCloud Photos, the entire contents of the library re-updates with iCloud after the repair process completes.