Got this motherboard in today and did a little testing. Here are the basic system specs: MSI Z77A-GD65 i5 2550k 8gb DDR3 2133 60gb Corsair Force 3 SSD 500gb WD caviar black Radeon HD 5770 some ratty old POS PSU on it's last leg I used chameleon wizard to install chameleon bootloader, built the boot.plist with only GUI - ethernet built in - GE=yes, and set smbios to mac pro 3,1. Downloaded and installed the latest fakesmc, hnak's intel ethernet kext, and applied flaked's speedstepper. I have not yet tried out the 898 sound but looking at toleda's post it doesn't appear it will be an issue. FYI, I'm not using any dsdt at the present time. If you've built hacks before, definitely no reason to fear this board and I imagine some of the lower end models will be even easier since they have compatible realtek lan and audio. Since we only have 2 reasonable choices in the current gigabyte z77 crop, the MSI lineup looks like a viable alternative and they are priced nicely. I'm sure I'll get this question a lot...Yes, sleep works (as long as you don't try to use the intel lan kext in multibeast). I would recommend learning how to do an os x install without using multibeast as the easybeast option adds items you don't need. The only minor annoyance is that the boot time is long. The system stalls with the "waiting on DSMOS" message, the hard drive spins down, spins back up, and you eventually get to the desktop. I've googled this issue but the suggestions are kind of all over the place and it appears to be a problem with real macs as well. I don't think this is motherboard specific but I'll investigate some more with different graphics cards, etc. Any suggestions would be appreciated! I also tried booting with the 3rd party ASMedia controller and that works too. I'm perfectly willing to try out a modded BIOS but haven't heard from samisnake yet...where are you dude? One last note: You can overclock by adjusting the turbo multipliers and not lose the power management features. I was able to get 9 p-states with the top end being 44. TBH, I don't think I ever tried that with a z68 board so maybe that's nothing new. And one more: USB 3 doesn't work (big surprise).