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By Jason Snell for Macworld
My Apple ID has seen a lot. I’ve used a lot of Macs and iOS devices over the years, and reviewed a whole bunch more. As a result, I’ve gotten some insight into all the lists Apple keeps about your personal constellation of Apple hardware. It’s a bit confusing, since there are multiple lists, with different restrictions, measuring different things! Here are the ways the Apple counts what you’ve got-and what it lets you do with those lists.