Hey everyone, I have an old Mac Pro and I've been trying to set up dual booting with Mountain Lion and Windows 7. So far, it's been a bit of a disaster. I hope you can help me stop rendering my Mac Pro unbootable every twenty minutes The situation: 1. The machine: Mac Pro 2,1 with ATI 6870. 2. I have installed Mountain Lion using http://www.jabbawok.net/?p=47 guide. Simple and brilliant. 3. My disks setup looks like this: Code: /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *120.0 GB disk0 1: EFI 209.7 MB disk0s1 2: Apple_HFS Mountain Lion 99.5 GB disk0s2 3: Apple_HFS Scratch 19.5 GB disk0s3 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *500.1 GB disk1 1: Apple_HFS Chameleon 1.1 GB disk1s1 2: Apple_HFS Install Mountain Lion 8.1 GB disk1s2 3: DOS_FAT_32 AVAILABLE 490.9 GB disk1s3 /dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.1 GB disk2 1: EFI 209.7 MB disk2s1 2: DOS_FAT_32 AVAILABLE 499.8 GB disk2s2 Facts and questions: 1. As you can see, I have two disks available: disk1s3 and disk2s2. Which should I install to? I tried with disk1s3 and failed miserably. 2. I know that Chameleon won't boot off of a USB stick, so I probably should restore Windows 7 DVD onto disk1s2 partition. Is that right? 3. ATI 6870 = no Bootcamp boot screen. 4. Bootcamp Assistant doesn't work on this machine at all (throws "You must update your computer's Boot ROM firmware before using this setup assistant.") 5. I tried installing Win7 via Parallels and didn't manage to make the partition appear in Chameleon bootloader. Can anyone give me any pointers on how to achieve dual booting in this setup please? I am kind of tired of trial and error method like I said, I've rendered my computer unbootable a number of times over the past few days, I want this nightmare to stop Thanks in advance! TL;DR Mac Pro 2,1 with Mountain Lion, I can't figure out how to dual boot Windows 7. Please help, I'm at my wit's end!