This is an old question, but in my defence, I have searched the forums, and I have Googled, but all the info I have found is at least a couple of years out of date and most links to various tools and tricks go to dead pages (even Apple's own support page). I have a mid-2007 iMac, and I want to install Windows 7 64-bit. With Lion, and Boot Camp 4.0.1, do I still need to do something fancy to get the 64-bit Windows 7 to install and run, or does it just work now? I'm familiar enough with Macs, but when it comes to Windows and EFI and BIOS, I'm new and I don't fully understand the terms. Your help would be appreciated!