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1. Mac Rebuild Photo Library On Mac
2. Rebuild Mac Photo Library
3. Repair Photos Library Mac
4. Mac Os Rebuild Photo Library
5. Apple Photos Rebuild Database

1. IPhoto has an undocumented 'Rebuild libary' option. Press Shift-Option while starting up iPhoto to invoke it, and you will get a rather scary message about possible loss of data if there is any unreadable data. Clicking OK will allow you to select a new location for your library (make sure you have enough space).
2. Select any set or all photos. Choose Export. From the Export dialog box, choose either Current or Original from the Kind pop-up menu, then click Export. Choose a destination and click OK. Drag the exported photos into the Photos library or use File Import to select and import them.

Mac Rebuild Photo Library On Mac

Dec 18, 2014 Repair Database – Using the repair feature is a little less obtrusive than rebuilding it, and should be used if you believe you’re missing images or if iPhoto as a whole isn’t working well. Rebuild Database – Use this as a last resort if the others fail to fix your issues. This is useful if iPhoto quits unexpectedly, won’t load at all, or freezes in loading.

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:

Rebuild Mac Photo Library

• 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.

Rebuild Mac Photos Library: a reader asks…

I seem to have damaged my Macbook’s Photos library as there are tons of photos in the library but they don’t show the images. What can I do?

The MacOS Photos app is really great about helping you manage your photos, but there are a few things to be aware of. First off, when you import photos into the app, the originals are stored in a hidden folder, and don’t appear in the Pictures folder on your computer. Instead you’ll see a single file called “Photo Library”. Unfortunately, a number of things can cause this file to disappear (including you deleting that file). Your first thing to try is to find that file (search for “Photo Library” either in Spotlight or Finder) and put it back in the original location. This location is in your User account under Pictures. Now re-open Photos and see if it’s all back. If not, continue on.

Repair Photos Library Mac

The next thing to try is to repair the Photos app library. With Photos not running, hold down the option and command keys while you double-click the Photos app icon. You should see a popup box appear asking if you want to repair your library. Click the repair button and go get a cuppa coffee as the repair may take awhile.

If none of that works, then you can give this process a try:

1. Open your Photos App, then click on Photos (in sidebar on the left)
2. Select one thumbnail and then press Command+a, in order to select all photos at once (or select just a few to try this out). After you’ve selected the photos, right-click and choose Rotate. This might take awhile.
3. Once the app has rotated all the photos, right-click again to rotate the opposite direction to put them back to normal. At this point, the Photos app should have rebuilt the thumbnails.

If all else fails, then your operating system may have become corrupted. This is a bit more drastic to resolve. First, make a Time Machine backup of all your files, and make sure you have the installation programs (usually .dmg files) for all installed software. Also make a record of the customizations you’ve made to your Mac. Then:

Restart your Mac in Recovery Mode. With the system off, hold down the Command and R keys while you press the power button. Keep holding down the Command and R keys until the system starts up (you’ll see the MacOS utility window).

Mac Os Rebuild Photo Library

Now erase your hard drive by opening Disk Utility, choose your internal hard drive on the left and click the Erase button. You’ll be presented with options to reformat the hard drive, so choose MacOS Extended and give your hard drive a name. Then click Erase.

Apple Photos Rebuild Database

When the erasing process is done, quit Disk Utility. Now selecte Reinstall MacOS and follow the on-screen instructions. When the process is complete, you can restart your Mac, and go through the initial setup steps (you did this when you first got your Mac). Reinstall your programs, re-do your custom configurations and settings, and finally, restore your Time Machine backup.

At this point, you may have to re-import all your photos into the Photos app, you’re basically starting with a fresh and clean computer, the way it was when you first purchased it.

Of course if you have an Apple Store close by, and are still covered by warranty or AppleCare, you can make an appointment with the Genius bar. But they will basically do only some of the above (erasing your hard drive and reinstalling MacOS), you’ll still have to restore your personal files, install your programs etc.