WHere do I go now to backup a phone on a MacBook Air? My new iPhone 12 128 GB Pacific Blue should be arriving within the next few hours. I want to be ready by having already backed up what will soon be my former iPhone XR to my new MacBook Air that I purchased last month. Since there is no longer iTunes, I don't know where to go to backup the iPhone to a computer so that I can restore it to the new device when it arrives.