If i enable it on my MacBook Air, will all my photos start uploading to the cloud? All I want is for all of my iPhone and iPad photos and videos (which are already in iCloud Photo Library), with their edits, to automatically download onto my Mac. Then I also want the photos from my bridge camera, and from years ago (which aren't on my iOS devices) to show up just on my Mac in the Photos app. Is that too much to ask? Is this possible or no?