If you were to log in, you'd be able to get more information on your fellow community member.
You no longer have to have NT as your primary operating system. Install VMWare (http://www.vmware.com/) on your Linux box and then you can run FreeBSD, BeOS, Windows95, Windows98, WindowsNT, and Windows2000 concurrently under X. This is a great way to see if your website looks right on different os/browser combinations. You could also run Linux in a window of your NT box.
The MacOS Human Interface Guidelines are available online at: developer.apple.com/techpubs/mac/HIGuidelines/HIGuidelines-2.html