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The record identifies the photo or video’s file name, title, size, storage location, file path whether edited, favorite, grouped, from a shared album, recently deleted, hidden, live, depth or burst photo and a lot more. ZASSET (Big Sur), ZGENERICASSET (Catalina) and RKMASTER (Mojave and older) contain one record for each photo and video. The important tables and their contents are as follows: The database in Photos 7 (Monterey) is mostly like Big Sur, with a few tables renamed and added. Here is a summary of what these databases contain:Ĭontents of the Photos databases for Big Sur, Catalina and High Sierra These databases contain several tables that store data needed to synthesize all of Photos’ features. It’s named Photos.sqlite in Catalina and later, and Photos.db in Mojave and older macOS’s. The engine that drives Photos is an SQL database. The rest stay in the library with isHidden pointer until you click review and decide which to keep. So a 9 sec burst has 90 frames, but Photos only shows you one frame. Burst is a sequence of shots captured by iPhone at 10 frames/sec.
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mov files, and can only be viewed within Photos. However, deleting a photo from the library deletes it from all the albums.Īs for special photo types: Live photos are stored as a combination of. If you delete a photo from an album, it still stays in Photos library and other albums to which it belongs.
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Likewise, deleting photos from albums doesn’t free up space - it only amends the database records. Thus, adding photos to albums doesn’t use extra space because Photos still has only one copy of each photo. Photos stores albums’ details - album names, which photos they contain and the sequence - and with this creates an album view when you ask. The edited version isn’t created when you view a photo - what you see is its JPG version incorporating the latest edits, which Photos stores in the Resources folder.Īlbums are also generated only when you open them. Photos generates the edited versions only when exporting them - it takes the original unedited photos, applies the editing instructions stored its database, and adjusts them according to the export options or defaults that you have chosen. This is more efficient than storing both original and edited versions. They are generated on the fly, as needed. Well, we found our unedited photos, but where are the edited photos saved? The short answer: Nowhere. Afterwards, we’ll look at the ICPL and referenced files. We’ll first explore the simple case where everything is saved in the Photos library itself. Welcome to a tour of the engine room of Photos for Mac, including an insight into the databases that power everything you see and do in Photos. Called “referenced” filesĪs for photos that have been edited, and albums, it’s a bit more complicated.