Jul 26, 2018 Apparently Apple has seen this happen before, because the company has a hidden Photos library repair tool. Here’s how you can use it to fix issues with Photos, including a library refusing to open or showing errors when copying. Sep 22, 2016 just update from OsX 10.11 to macOs Sierra. After rebooting I keep getting this message: 'macOs needs to repair your Library to run application. Type your password to allow this.' I google around a bit, but of course there is nothing about the last Apple Os. I already did a disk utility repair. 2015-4-29 So, my suggestion to everyone, if you are considering uploading more than 10,000 photos to iCloud, STOP!!!!! Do not do it. If you have more than 10,000 photos in the library, save the photos in external drive, create a NEW Photo Library in photos application and import little at the time while iCloud Photo Library is turned on. A patented specialized Windows repair program. It will diagnose your damaged PC. It will scan all System Files, DLLs and Registry Keys that have been damaged by security threats. a patented specialized Mac OS X repair program. It will diagnose your damaged computer. Nov 01, 2017 Many Users that recently upgraded their MacBook to macOS High Sierra are getting overwhelmed with an error/warning message. The message suggests that the OS High Sierra needs to repair library. Users report seeing this message multiple times during the day which can be very annoying, to say the least. Contents0.1 Related Articles1 Check Your Hard.
Photos User Guide
Even if you use iCloud Photos, it’s important that you always back up your library locally using one of the following methods:
Sierra
Use Time Machine: After you set up Time Machine, it automatically backs up the files on your Mac. If you ever lose the files in your Photos library, you can restore them from the Time Machine backup. For more information about setting up Time Machine, see Back up your files with Time Machine.
WARNING: If a Photos library is located on an external drive, don’t use Time Machine to store a backup on that external drive. The permissions for your Photos library may conflict with those for the Time Machine backup.
Manually copy your library to an external storage device: Drag the Photos library (by default in the Pictures folder on your Mac) to your storage device to create a copy.
If you have more than one photo library, be sure to back them all up.
Important: If any of your image files are stored outside your photo library, those files (known as referenced files) aren’t backed up when you back up your library. Be sure to back up those files separately. To make it easier to back up all your image files at once, you can consolidate referenced files into your library. See Change where Photos stores your files.
