Hi Apple iPhoto/Photo Users... Not sure if anyone else has felt "the wall" when trying to invite a lot of people to a shared album --  it seems arbitrary we have a limit of 100, or is there an empirical reason for this -- the message below was just shared via the "Apple Feedback" site... here is the link -- perhaps if more people could contact them for the iPhoto / Photos apps, they'll increase the number? 

Feedback: Photo Sharing limits

http://www.apple.com/feedback/photos.html

Thanks if you have a moment to click + leave feedback!!!

Peace,

JBinCalifornia

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ISSUE: The limit of 100 email addresses for an album has continually caused "frustration" when trying to share it.  Currently, the Photos app is "laggy" when dragging / dropping a large set of email address over from the Mail app (aka beachball... also, there isn't any message to cue users i.e. "PhotoSharing only supports 100 invitees")

POSSIBLE SOLUTION:  Upping the number of people you can invite to view an album (250? 500?) for a standard family with a connection to a large group (i.e. our scout troop has 75 kids x2 adults... assuming everyone has their own email address, it would be 75 + 75 + 75 (=225) people we'd want to share the album with...

It would be GREAT if we're able to expand the number of invitees for albums to more than 100!!!

THANKS + GO APPLE!!

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More info re:

iCloud Photo Sharing limits

https://support.apple.com/en-us/HT202299