Hi, I have a 2010 Mac Pro and I'm having issues installing EFI Firmware 1.5 and OSX 10.6.6. The first time I tried to install the EFI, I got into it - it showed the grey screen with the Apple logo and the progress bar. Only after 6 hours the progress bar had never moved and I needed to use my computer so I restarted it. Does it normally take that long? Tried again a few weeks later and this time left it over night (10-12 hours) and again the progress bar had never moved and I restarted. So thats problem 1, problem 2: Does the 10.6.6 update require the EFI Firmware 1.5? When I try to install 10.6.6 it downloads it and then restarts, but then says there was an error and to try again. I've tried 3 times now with the same error. Anyone have any insight? Thanks!