photo
When I add photo's to a shared album the photo's in the shared album have a much lower resolution than the original photo's. How come?
iMac Line (2012 and Later)
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Top-ranking reply
Because apple does it that: way.
The following
How to share albums in Photos on your iPhone, iPad, and Mac - Apple Support
includes:
"When shared, photos are reduced to 2048 pixels on the long edge, except panoramic photos, which can be up to 5400 pixels wide. You can share GIFs that are 100MB or smaller."