How big can a Photos library get?
Q I have one huge Photos library with hundreds of albums and more than 20,000 images. What’s the maximum size, and how can I avoid it?
by TOMMY SHIELDS
A Apple doesn’t publish limits on the size of Photos libraries. Early versions struggled with just a few thousand, but as the app has matured it has coped better with far larger. However, as libraries grow, and video clips are added, more users encounter problems. At present, trying to keep a library of more than 100,000 images is probably pushing Photos to its limits.