My new iMac Retina is arriving in a few days and I would really like to do a clean/new setup and not use migration from my Time Machine backup. My thinking on this is that I will not have a bunch of stuff brought over from previous updates on the 2012 iMac. I want to makes sure though that after the new one is setup I can connect my Time Machine drive and restore my iTunes, Photo’s library file and my emails that are stored in several folders in On My Mac part of the Mail app. Maybe I am over thinking this. I have not had any real problems since I got the 2012 iMac except a few days ago when I tried to connect a new Thunderbay Mini 4 with 4 SSD drives and SoftRaid installed from OWC. It was crashing a lot and OWC recommended I re-install OS. Thanks for any thoughts or suggestions.