Apr 01, 2020 Designate a System Photo Library in Photos If you have multiple photo libraries on your Mac, you can choose one to be the System Photo Library. The System Photo Library is the only library that can be used with iCloud Photos, Shared Albums, and My Photo Stream. Jan 13, 2020 On your Mac, your photo collection is separated into four main categories: Years, Months, Days, and All Photos. The All Photos tab shows all your photos and videos in chronological order. In Years, Months, and Days, you'll find your photos and videos grouped together based on the time and place they were taken. Photos app allows you to create a new photo library for specific purposes like personal, private, work and more. There is not mentioned about a limit to how many new photo libraries you can make in Photos app for Mac. Once you have create a new photo library in Photos app, you can connect a camera or memory card to import photos.
Photos User Guide
Manually copy your library to an external storage device: Drag the Photos library (by default in the Pictures folder on your Mac) to your storage device to create a copy. If you have more than one photo library, be sure to back them all up. May 06, 2018 If you get mostly normal behaviour with the Photos app on your wife's iPhone then it might be worth reporting this issue via Instagram as a bug. No doubt a huge library will slow down the Photos app a little, but 3rd party apps might not be tested to work with such large libraries given I imagine it's a bit of a rarity. You may want to be careful to check the Mac Photos app is not set to ‘optimise library’, in which case not all photos reside on the local drive but may be stored in iCloud Library instead, with only a low-res preview in the local library. Going through the photo export menu will actually download all photos. Apr 22, 2015 How to use multiple photo libraries with Photos for Mac. Library and then enable iCloud Photo Library. The Photos app will then upload the new library's photos to iCloud Photo Library.
Google Photo App
Even if you use iCloud Photos, it’s important that you always back up your library locally using one of the following methods:
Use Time Machine: After you set up Time Machine, it automatically backs up the files on your Mac. If you ever lose the files in your Photos library, you can restore them from the Time Machine backup. For more information about setting up Time Machine, see Back up your files with Time Machine.
WARNING: If a Photos library is located on an external drive, don’t use Time Machine to store a backup on that external drive. The permissions for your Photos library may conflict with those for the Time Machine backup.
Manually copy your library to an external storage device: Drag the Photos library (by default in the Pictures folder on your Mac) to your storage device to create a copy.
Download Photo App
If you have more than one photo library, be sure to back them all up.
Important: If any of your image files are stored outside your photo library, those files (known as referenced files) aren’t backed up when you back up your library. Be sure to back up those files separately. To make it easier to back up all your image files at once, you can consolidate referenced files into your library. See Change where Photos stores your files.
Photo library mac os x version 3.0 3271.13.150. So we could not transfer the metadata using XMP sidecar files.But thanks for pointing this out.