Updating to 10.10.2 with EFI Mac Edition GTX980
Sadly, the wonderful ability we had in 10.10.1 to run EFI GTX980 with just the EFI driver in 10.10.1 has been lost in 10.10.2. (i.e., it will KP with OS X 10.10.2 driver)
So, when you go to update here is order:
1. Open Terminal and run "sudo nvram boot-args=nv_disable=1"
2. Enter password and hit enter, this will disable nvidia drivers on next boot.
3. Run the 10.10.2 installer
4. When machine reboots you will only have 1 display running via the EFI drivers, it will be sluggish and have strange horizontal sweeping upward, normal.
5. Open Terminal and type "sudo nvram boot-args=nv_disable=0" (better still just remove it)
5. The Nvidia driver manager should open, if not open it. It should prompt to install 343.02.02f01, do it.
6. CUDA for 970/980:
http://www.nvidia.com/object/macosx-cuda-6.5.46-driver.html
On next boot, all should be well.
A "repair permissions" could be good to.
NOTE ; IF YOU ARE USING "TRIM ENABLER" YOU WILL NEED TO FOLLOW CINDORI'S INSTRUCTIONS BEFORE MINE.