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Duplicating a library


If you want to make an exact copy of one of your libraries, either as a backup or as part of moving a library to another disk, you can do so one of two ways.

Note: if you have unchecked the “Copy items to the Photos library” checkbox in the Advanced section of Photos’ preferences, and have since imported photos into your library that refer to photos outside the Photos library, any such photos will not be copied anywhere. The duplicate copy of the library will simply refer to the same photos in the same locations. If you’re duplicating the library with the intention of transferring it to another machine, the duplicate library will not be able to find any of the external photos if they are not available from that machine.

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