I understand I am able to purchase Windows 8 OEM for use in Parallels on my Mac due to changed OEM terms, is this correct? If I purchase Parallels from their website does it offer the ability to re-download? Media isn't an option as it's for a MacBook Air. I've read bits and pieces around the web where Windows OEM is tied to the motherboard by a code. Is this true? How does it work on a Mac either by BootCamp or Parallels? Is there other ways it can be tied to your Mac permanently? I ask because I'm considering using it on my current Mac but the main use will be on a new one so don't want to tie it to my old one. If using Parallels is your hard drive changed at all? By this what I mean is how is HD space created for Windows and boot sector, etc?