

You want to download full resolution versions of your photos for access when offline.You may want to grab a photo from your iCloud Photo Library but you aren’t on your Mac.In other words, you may be able to view your photos on your Mac, but if you wanted a high-resolution version you might need to download it from iCloud. In order for your photos not to take up gigabytes of space on your devices, Apple uploads a full-res version to iCloud while showing a low-res version of on your device. Perhaps you want to use a full-resolution version of a photo in a presentation, or to send to a friend or family member.You might want to download copies of your iCloud photos to your Mac so that you can back them up – perhaps because you need to reclaim some of the space currently given to your Photo library by archiving old images.

