why won't my iMac back up large quantities of photos from my iPhone?
why won't my iMac back up large quantities of photos from my iPhone? backing up takes ages, if it works at all. we've not done this for a while so there's almost 3,000 photos to back-up, but it keeps getting stuck after only 50 or so. taking ages.
iMac, OS X Yosemite (10.10.5)