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Message: <blockquote data-quote="c2149971" data-source="post: 1649332" data-attributes="member: 340219">I have a Mac Mini Sever and Mackbook Pro (MBP upgraded from HDD to SSD) both running (pre-loaded) OS X 10.7.5, which I'm preparing to upgrade to Yosemite.  I never created an Apple ID and I didn't need an one, recently when I re-downloaded and installed a clean version of OS X 10.7.5 for my MBP thru Internet recovery but apparently, I need an Apple ID to upgrade to Yosemite.That said, if you have more than one device and have already created an Apple ID(s) with associated email addresses but you had the chance to create them all over again, what would you do differently as far as selecting your Apple ID and associated emails?For example, would you use one Apple ID and one email for all your devices or some other strategy and why?</blockquote>