MacBook Pro i7 Mid-2012 (MacBookPro9,2) running Mac OS X 10.8.5: Downloaded the "offered" EFI SMC Update 1.8 through the AppStore Updates. MacBook restarted, grey progress bar appears w/ spinning wheel, progress bar disappears at 20%, wheel spins a few more seconds, then display turns black and Mac shuts down.
When I hit the power switch, same routine again: progress bar & spinning wheel until Mac shuts down w/ incomplete update. Tried SMC reset and Parameter RAM reset. Nothing helps. Can boot from recovery partition, but otherwise I'm suddenly trapped, which really sucks.
Don't know what to do next. My idea would be to boot in Single User Mode (CMD-S at restart) and remove the SMC EFI Updater from the boot routine via command line. The question is: How?