The primary hard drive in my Mac Mini died. I have a repair shop replacing it, and they promised to install a working version of OSX, but maybe not the same version I used to have. Everything is backed up using Time Machine (yea!), but I've never gone through a restore before. What do I need to know? I mean, it's a Mac; I wouldn't be shocked if I just plugged in the Time Machine drive and it did everything for me, but I always like to be prepared.