Hi all, I need to use Vista (rather than Win 7) as my Windows installation to be compatible with my company VPN. I've done a clean install of Vista SP1 and then performed all the updates. Despite Vista being AHCI/SATA aware the drives (both my X25-M G2 and the SATA optical drive) are showing as ATA devices. I've since tried installing the nvidia SATA driver from boot camp 3 and got a blue screen on reboot. I then tried the MS AHCI driver included with Vista and it rebooted fine, said the controller was SATA but the drives were still ATA. I repeated the process having edited the Registry so that the msahci start key was 0 and still had the same results. Almost as if SL/EFI is presenting the disks as ATA (despite them showing in SATA on OSX). Is there any way to make EFI present the disks as SATA? I've plenty of PCs running as SATA and the only analogous situation I've seen is when the BIOS is set to ATA and not AHCI. As soon as you set AHCI in a PC you get the SATA drives (unless the msahci or drivers aren't set and then you can't boot). Cheers Alex PS - I meant Macbook Pro!