Next time try not to use any application while upgrading the OS X. When finish run a repair permissions just as a precaution.
Hi guys, I've got a similar problem. Well, sort of.
I decided to upgrade my 2008 Mac Pro to 10.8. I downloaded it via the app store, ran it and let it do its thing.
After it had finished the Mac booted up and took me to my log in screen.
This is when I realised that the Apple USB aluminium keyboard doesn't work any more. The mouse didn't either so I plugged that in directly to a USB port and it worked great. But the keyboard still doesn't.
I've tried a spare USB aluminium keyboard with no joy and I even tried a HP USB keyboard with no joy.
So in short, I can't log in as I have no way of entering my password. Any ideas?
We are in the same boat. I have Mac Pro 3.1, tried ALU wired and bluetooth apple keyboard, both are dead in ML install.
https://discussions.apple.com/message/19038505#19038505
https://discussions.apple.com/thread/4137142?start=0&tstart=0
Just one thing I dont understand: there is a lot of people who have Mac Pro 3.1 with no single problem with Mountain Lion:
MacPro '08 3,1 and Mountain Lion - MacRumors Forums
What could be our problem: EFI version maybe ?
Mountain Lion will NOT install on any Mac with 32-Bit EFI. That is a known and confirmed fact. There is no more 32-Bit Kernel in Mountain Lion. The WHOLE computer and not just the CPU has to be 64-Bit from the EFI Firmware on.