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iPhoto library unreadable or in use by another application

None of my photos will appear when I open my iPhoto library. Keep getting the message below.


"Your photo library is either in use by another application or has become unreadable"

"Shut down and restart your computer, and then open iPhoto again. If the problem persists, try rebuilding your photo library. To do this, quit iPhoto, and then reopen it while keeping the Option and Command keys pressed. You can also try restoring your photo library from a backup."


Restored my library from time machine and still got the same message.

MacBook Pro (13-inch Mid 2010), OS X Mountain Lion (10.8.2)

Posted on Jun 23, 2013 9:16 PM

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6 replies

Jul 8, 2013 12:33 PM in response to jhmccain

For others who may be experiencing this issue, it just happened to me as well. Here's what worked for me: first hold down your option and command buttons at same time and open iphoto. A box comes up with many options to choose. Select the last three (3) boxes (it allows you to select more than one) and then hit "rebuild." In just a minute, all my photos reappeared as they were. Phew. Hope this works for you too.

iPhoto library unreadable or in use by another application

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