When I try to install Windows7 with Bootcamp, it mention Windows 32 bit, no word about 64. Can I install Windows7 64 bit Ultimate?
Yes, 64 bit Windows 7 Ultimate is supported. But you need at least Boot Camp 3.1
Update: I just glanced over Boot Camp documentation and according to it 64 bit compatibility actually depends a bit on your Mac model:
You can use a 64-bit version of Windows Vista or Windows 7 with any of these Mac computers:
- A Mac Pro or MacBook Pro introduced in early 2008 or later
- An iMac or MacBook introduced in late 2009 or later