![iphoto for sierra iphoto for sierra](https://www.macxdvd.com/mobile/article-image/iphoto6.jpg)
This is the library that will eventually contain all the merged photos. To start the process, you must decide which Photo library you wish to be your main library.
![iphoto for sierra iphoto for sierra](https://lemppics.lemp.io/how-to-install-iphoto-on-mac-os-sierra-.jpg)
(The main library, which will hold all the merged photos, must be designated as the System Photo Library.) A large photo library could take a week or more for the process to complete.
![iphoto for sierra iphoto for sierra](https://miro.medium.com/max/1400/1*mAPTZhr_nZDRiOAoHOSCKQ.png)
#Iphoto for sierra download#
The upload and download from iCloud Photo Library isn’t particularly fast. This could cause overage in cellular data plans if an iPad or iPhone is being synced.