So, yesterday my rMBP froze solid. Hard reboot and it hung at the Apple screen. Tried a quick SMC and PRAM cleanse but no good. Came down to restoring from Time Machine but still no luck. Before going forward let me say that the data is fine, verified. Ultimately wiped partition and did a fresh install. Booted fine. Imported data during the install and booted fine. Since there were a number of little things not brought in I did another restore. Back to not booting. I could start over and run with the import and do all of the niggling to get settings set back but would like to know if anyone has run into this. It bothers me not knowing what the issue is. Certainly not hardware, thank goodness. rMBP Mid-2012 750GB SSD 16GB RAM Also, at one point I had an error in Disk Utility for the EFI partition but it only came up once. Even after the restores it checks clean. Thanks for any advice. Sorry for the abrupt nature, I hate typing this much on my phone.