Splitting Iphoto Library On Mac

If your iPhoto library is huge, one way you can cut it down is to remove all of the videos and store them elsewhere. But finding and then deleting videos in iPhoto can be tricky. You'll need to create a smart album, and then flag the videos before using a hidden command that moves all flagged items to the trash. IPhoto Library Manager also lets you move photos between Libraries. For example, if you want to move an album or a folder of albums from one Library to another, choose the source album on the left. 2 Responses to “Splitting iPhoto Library ” Yoshida says: April 4, 2013 at 12:41 am 写真データだけで何百GBとはさすがです。気兼ねなくシャッターを切れることがディジタルカメラの良さですが、大量のデータの管理も楽ではないですね. 2020-4-6  If you have iCloud Photo Library and want to back up all your photos to a storage device attached to your Mac you can follow the guide above, but you will need to.

Your Photos library holds all your photos, albums, slideshows, and print projects. If your library is large, and you want to free up storage space on your Mac, turn on iCloud Photo Library and use Optimize Mac Storage, or move your library to an external drive.

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Before you start, be sure to back up your library.

Prepare your drive

You can store your library on an external storage device, such as a USB or Thunderbolt drive formatted as APFS or Mac OS Extended (Journaled).1 Find out how to check the format of your external storage device.

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To prevent data loss, Apple doesn't recommend storing photo libraries on external storage devices like SD cards and USB flash drives, or drives that are shared on a network.

Move your Photos library to an external storage device

  1. Quit Photos.
  2. In the Finder, go to the external drive where you want to store your library.
  3. In another Finder window, find your library. The default location is Users > [username] > Pictures, and it's named Photos Library.
  4. Drag your library to its new location on the external drive. If you see an error, select your external drive's icon in the Finder, then choose File > Get Info. If the information under Sharing & Permissions isn't visible, click , then make sure the 'Ignore ownership on this volume' checkbox is selected. If it's not selected, click to unlock it, enter an administrator name and password, then select the checkbox.2

  5. After the move is finished, double-click Photos Library in its new location to open it.
  6. If you use iCloud Photo Library, designate this library as the System Photo Library.

Delete original library to save space

After you open your library from its new location and make sure that it works as expected, you can delete the library from its original location.

In a Finder window, go back to your Pictures folder (or whichever folder you copied your library from) and move Photos Library to the trash. Then choose Finder > Empty Trash to delete the library and reclaim disk space.

Open another Photos library

If you have multiple libraries, here's how to open a different one:

  1. Quit Photos.
  2. Press and hold the Option key while you open Photos.
  3. Select the library that you want to open, then click Choose Library.

Photos uses this library until you open a different one.

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Learn more

If you have a permissions issue with your library, you might be able to resolve the issue by using the Photos library repair tool.

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1. You can't move your library to a disk that's used for Time Machine backups.

2. If the volume isn't formatted APFS or Mac OS Extended (Journaled), or has been used for Time Machine backups but hasn't been erased, this checkbox will either not be present, or won't be selectable after unlocking. Erase and reformat the drive for this option to be available.