Sure thing! All the credit goes to all the folks on this thread and this awesome website.
I basically did the Unibeast/Clover combo that jackie099 described:
http://www.tonymacx86.com/yosemite-...porary-guide-os-x-10-10-0-a-7.html#post891392
The only differences I did were:
1) Added VoodooTSCSYNC.kext to Unibeast. This makes installation a true 12 minutes and not 30-45 min using cpus=1.
2) Booted Unibeast USB with -v -x npci=0x2000
3) My Clover boot flags are dart=0 npci=0x2000 kext-dev-mode=1
4) My version of GTX 780 doesn't need the web drivers so I didn't add boot flags for that
Per my previous post, you should use BIOS version F9c and default settings for installation. I've tried various things and system is pretty stable with no crashes or panics.
What still doesn't work or is questionable:
a) CPU power management, but don't expect that until Apple adds Haswell-E to Mac Pro line. Not to raise this debate again but I don't see this as much power savings or decrease in CPU life since it only locks the clock speed and not current draw. I can tell by the speed of my cooling fans that the CPU is at a pretty low temp when idle or low load despite not having power management/Speed Step.
b) Sound - there are a few threads on this since it's the same codec thats on many x99 boards, but I won't use since my sound is through Bose Soundlink and use wireless LG bluetooth headset. Also have USB audio adapter if my batteries die.
c) Ethernet works but system info shows generic ethernet. iCloud and Appstore/iTunes works fine and shows my family share. Will confirm iMessage later.
d) Trim for SSD. I expect our excellent community of devs will figure this out soon.
e) Restart - ends up in cold boot (power off with auto power on) which wipes the over clock settings. I only power down now as a work around. Windows doesn't suffer from the same problem which is fortunate with the gazillion windows updates we get. I suspect Gigabyte is at fault here with their BIOS. Would love to hear what the Asus and MSI folks are experiencing.