iPhoto: Issues with FAT32-formatted drives

If you store your iPhoto library on a volume that is formatted as FAT32 (a file system commonly used on Windows PCs), you may encounter issues including poor performance or data loss. Referenced images stored on FAT32 volumes may also sporadically go offline. Additionally, storing the iPhoto library on a network rather than locally on your computer can also lead to poor performance or data loss.

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iPhoto libraries should be stored on a locally mounted Mac OS X Extended drive for best performance.


Many external drives come pre-formatted as FAT32. Use Disk Utility to format new external hard drives as Mac OS X Extended before using them with iPhoto. For instructions on how to do so, follow steps in Format external drives to Mac OS Extended before using with Aperture.


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