Your digital camera and phone are full of photographs that you subsequently send to your Mac, where you edit and duplicate them. If you're like most individuals, you probably shoot 10 to 15 shots from a single perspective.

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Then you will know, which items in your library are damaged or missing and can try to fix problematic items (convert them to a more compatible format or restore missing items from a backup). I would do this in small batches, by selecting only a few albums or folders at a time.ĭoing it for only small batches of photos at a time will help, when PowerPhotos will give you a list of items that could not be copied over. Power Photos might be able to fix this, by copying your Photos to a new library. Have you ever used a third-party duplicate remover on your Photos Library? Tools like Clean My Mac or similar can cause a library damage, that cannot be repaired, and cause the symptoms you are seeing now. TIFF should also be safe, but many of my TIFFs have been using unsupported, older color sync profiles and need converting. I did the same with any image file, that has not been HEIC, JPEG, or RAW. I removed and converted any file, that I could not import into a new library. In my library I tested for such legacy items by exporting all videos, that are not encoded HEVC or H.264 and importing them in small groups into another test library.

Photos may get stuck by trying over and over again to handle these files and fail, and the other items will never get analysed. If the background processes for the duplicate detection or the scanning for faces or objects get stuck, you may have items in your Photos Library, that have been imported a long time ago,and are in a legacy format, that can no longer be processed by Photos. But what a repair cannot do, is fix damaged or missing media files. It can collect orphaned files, and it can fix damaged internal database files. The Repair tool can fix the file ownership and permissions.

There may be problems in your Photos Library, that a library repair cannot fix.

Mac photos duplicates