Interesting. So, the Sapphire R9 380 Compact ITX card, which has DVI, HDMI and 2mDP ports, doesn't have a port match up in the AMD9000Controller like the 7950/7970 Reference Design in the AMD7000Controller. Does that mean it defaults to the RadeonFramebuffer?Just for information regarding the updated first post: The term '3xx' isn't very precise, because the 3xx series contains in fact three different architectures which all use different sets of framebuffers in OS X:
GCN 1.0 (e.g. Pitcairn in R7 370) will use AMD7000Controller
GCN 1.1 (e.g. Hawaii in R9 390) will use AMD8000Controller
GCN 1.2 (e.g. Tonga in R9 380) will use AMD9000Controller
This is completely wrong, R9 290X uses AMD8000Controller.kext and the only Framebuffers that it uses are Exmoor and Baladi7xxx/2xx Framebuffer Personalities
I second this. I've been trying to get a 6970 working for a few weeks, but have been foiled by the white screen problem. Changing frame buffers doesn't seem to help. No white screen with safe mode (-x). I really wanted this card to work to take advantage of its capabilities for Final Cut Pro, but almost ready to put the 9800GT back in.How do we get this to work in yosemite with an ati 6950/6970?
10.10 - a lot of flicker, not usable - I was barely able to run 10.11 upgradeHas anyone tested the R9 390X 8GB by MSi?