Yosemite install seemed to run fine on my GA-Z77N. Made the Unibeast usb installer , booted off that using F12. Ran the installer updating from Mavericks. When its all done it reboots and you get the can't find mach kernel. To be expected before applying Multibeast. Re-started F12 usb and selected the startup drive , booted up fine. Wi-fi working , no sound . Multibeast DSDT free + Realtec 892 for sound. Pull out the USB and its starting up fine in Yosemite.
Only one issue the USB ports are acting strange . I added Multibeast USB3-Universal and didn't seem to help. USB ports seem to be working at random. USB Mouse and keyboard are fine but when i plug in a stick or a printer it will work one time and then nothing the next.