Apple says not to use an earlier OSX version than originally came with the computer. But exactly what I have in mind. Has anyone done this successfully? Presumably a 2012 cMBP comes with Mountain Lion. I wish to use Snow Leopard, as a perfectly fine OS, and primarily so as to avoid the pain of the many steps involved in reverting (the regrettable insult of) iTunes 11 back to version 10. At the same time, to do this in conjunction with the installation of a new SSD. So the idea to load the SL install CD (which I have) in the optical drive power down and install SSD power up holding Option key to access installation disk presumably then format SSD in Disk Utility continue and finish SL installation then from this clean install, transfer that data desired from Time Machine backup Apple speaks of possible kernel panics and other terrible things if using an earlier OS version. If with a retina model something unfortunate seems likely, due the different screen if nothing elsewith the classic model, maybe not? Ideally I'd use the latest OS and keep it simple, only as said in its entirety not all that swell (in at least my opinion). So, is anyone using Snow Leopard on a 2012 cMBP and perfectly happy with the arrangement?