iCloud Photos keeps your photos and videos up to date on your iPhone, iPad, iPod touch, and Mac. If your photo library includes images in RAW format, you can view and edit them on your Mac or iPad.

About RAW files on your Mac

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  • All your photos on all your devices. ICloud Photos gives you access to your entire Mac photo and video library from all your devices. If you shoot a snapshot, slo-mo, or selfie on your iPhone, it’s automatically added to iCloud Photos — so it appears on your Mac, iOS.
  • Mar 18, 2020  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. Before you start, be sure to back up your library.

The intelligence system Photos uses when making the choices for the cover photo images as well as photo previews (see below) appears to be spot on, at least in testing on my relatively small image library. In previous versions of Photos the Photo category displayed images by the time they were taken, and further sorted them by location. Oct 25, 2013  Is there an equivalent of Windows photo viewer for the mac? I don't want to edit images in it, I just want to view in full screen and to go forward and back thought the images, with simple options to 'view at 100%' 'flip left/right', 'enlarge' etc.

The availability of RAW files on your Mac depends on a few conditions:

  • If you have the Download Originals to this Mac option turned on in Photos (Photos > Preferences > iCloud > Download Originals to this Mac), then your RAW files are always present in Photos on your Mac.
  • If you have the Optimize Mac Storage option turned on, then your RAW files are stored in iCloud Photos. The Photos app saves disk space on your Mac by displaying optimized JPEG versions of your RAW images. If you edit an optimized image on your Mac, Photos downloads the RAW file for that image.
  • When Photos downloads a RAW image from iCloud Photos, it creates a new full-sized JPEG for optimal viewing on your Mac. It won't replace the RAW and embedded JPEG file already stored in iCloud. iOS devices will view the embedded JPEG.
  • RAW files that you store outside the Photos app library (for example, in your Pictures folder) are always present on your Mac, but aren't stored in iCloud and won't stay up to date in the Photos app on your iPhone, iPad, or iPod touch.

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About RAW files imported to iPad with the Camera Connection Kit

If you import RAW images to an iPad with the Camera Connection Kit, turn on Download Originals or edit the images on your Mac so that the files are available on your Mac in iCloud Photos.

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.

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.

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

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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

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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.

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Photos uses this library until you open a different one.

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.

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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.