Can a Mac photo library automatically upload to iCloud Photo Library even when not switched on on the Mac?
If someone turns iCloud Photo Library on on both their iPhone and iPad for the first time, will the photos from the Mac running 10.10.5 (with the same apple ID and iCloud account) automatically upload to iCloud Photo Library if they don't turn it on on the Mac? Or does the Mac need to also have iCloud Photo Library switched on for the photos from the Mac to be uploaded to the iCloud Photo Library?
Asking for a family member whose 2009 iMac running 10.10.5 just took a crap. We're trying to figure out whether or not they need to pay someone to rescue their photo library. If the Mac's photos were automatically uploaded, then they're just writing it off. Unfortunately we can't check on the Mac ourselves to see whether or not that is the case.
iMac, OS X Yosemite (10.10.5), 27" late 2009