Other issues
As I noted in a recent post concerning performance of the new quad core iMacs, none of the quad cores will install Windows under Bootcamp without some serious finagling. The problem is with the stock ATI drivers and the way they interact with the virtualized display hardware under Windows 7. Evidently, they interpret the minidisplay port as the primary monitor under Windows 7 and so yield a black screen after the last reboot. If you attach a second monitor, you get to the point where the desktop is being configured for first use, but the installer loses contact with the DVD drive and the install fails to complete. If you have Parallels, you can let the installer run to completion using the My Bootcamp option, then boot into Windows and install the Bootcamp drivers, which restore proper monitor function, but sadly ditch the audio, which functioned prior. Furthermore, connecting to the internet seems to be hit and miss, even though the ethernet and wifi drivers are properly installed. All in all, quite a scandal. It would appear that the folks at Apple didn't even bother to try Bootcamp to see if it worked before shipping these machines.
As regards hardware problems, my Core i5 is incredibly sluggish when booting, taking as much as a minute and a half to two minutes to boot, and this on a clean factory install with nothing else added, except for my six firewire drives. My Core2Duo Macbook Pro (2.53 GHZ) accomplishes this task in about 30 seconds. And forget trying to boot into anything other than 10.6.2 Because of the new hardware (chipsets, cpu and video card), neither earlier installations of Leopard on hard disk or dvd will boot. Thus torpedos much of my repair and diagnostic software, necessitating time wasting upgrades all around.
I have also found the power button to be problematic. There is virtually no give to it compared to previous iMacs and it is often difficult to tell whether or not a boot up has been initiated. The lengthy delay between pressing the button and hearing the boot chime (as long as 15 seconds) leaves me wondering often whether I started the boot process or not.
Don't get me wrong, this is a gorgeous machine and a veritable speed demon once it has booted. It just seems to have more rough edges than usual for an Apple product. I have long worried that Apple's commitment to their computer business was becoming diluted as they push to become a consumer electronics company. The snafus with the 27 inch iMacs doesn't do much to alleviate that concern.