Archive for the 'ATI' Category

Fixing Radeon5700/5500 with MacOS 10.15.5

Macos 10.15.5 update caused kernel panics for owners of many Radeon Navi cards. Your card have to be POSTed (aka inited) at system boot to hit this issue.

So if you use flashed card on MacPro5,1 or you use the card in hackintosh (init is done by UEFI) then you might hit it pretty well

It could easily be fixed, you need to downgrade just one kext (kernel extension) to make things working again

First of all, you can still boot system without facing kernel panic in safe mode (hold shift on boot for mac, -x boot-arg on hackintoshes)

Get this kext from macos 10.15.4  – /System/Library/Extensions/AMDRadeonX6000HWServices.kext

Not posting it here as it would be pirating

steps to do

  1. disable csr if enabled
  2. boot 10.15.5 in safe mode
  3. open command line and type next command:
  4. mount -uw /
  5. sudo mv /System/Library/Extensions/AMDRadeonX6000HWServices.kext /Users/YourUserName/Desktop (replace YourUserName with your user name)
  6. sudo cp -a /Path/Where/You/Downloaded/Kext/From/10.15.4/AMDRadeonX6000HWServices.kext  /System/Library/Extensions/
  7. sudo chown -R 0:0 /System/Library/Extensions/AMDRadeonX6000HWServices.kext
  8. sudo chmod -R 755 /System/Library/Extensions/AMDRadeonX6000HWServices.kext
  9. sudo xattr -r -d /System/Library/Extensions/AMDRadeonX6000HWServices.kext
  10. sudo touch /System/Library/Extensions/AMDRadeonX6000HWServices.kext /System/Library/Extensions
  11. Now reboot, you can reenable csr (if it was enabled before) once your card starts working, as the kext we copied is original unmodified kext from apple.

Never Say Never

Some thought amd cards would never work again on macs without sse4.2


MP3,1, radeon 560, full metal and opengl acceleration in Mojave
Details in forum

it’s not Navi10, Navi16

In the comment to this news –

Navi10, Navi16, Navi9 is not chip names, the number is just c++ name separator

I would use c++filt name demangler to show this:

Function names as is:

$nm AMDRadeonX6000HWServices | grep Navi
























with c++ name demangling: $ nm AMDRadeonX6000HWServices | grep Navi | c++filt












AMDRadeonX6000_AMDRadeonHWServicesNavi::AMDRadeonX6000_AMDRadeonHWServicesNavi(OSMetaClass const*)


AMDRadeonX6000_AMDRadeonHWServicesNavi::AMDRadeonX6000_AMDRadeonHWServicesNavi(OSMetaClass const*)





AMDRadeonX6000_AMDRadeonHWServicesNavi::getMetaClass() const

AMDRadeonX6000_AMDRadeonHWServicesNavi::MetaClass::alloc() const

vtable for AMDRadeonX6000_AMDRadeonHWServicesNav

vtable for AMDRadeonX6000_AMDRadeonHWServicesNavi::MetaClass 


RX 480 already works in osx 10.12

More news:

Using same trick as for R9 Nano it was possible to get new RX 480 card working in osx.

Not very stable.

more info in forum.

MacOS 10.12 brings Fiji acceleration support finally

Good news from our friends.

One can get working acceleration (and finally a full working driver) on amd Fiji cards (R9 Fury/X/Nano)

Just add device id (0x73001002) into Baffins section (AMDBaffinGraphicsAccelerator) in /System/Library/Extensions/AMDRadeonX4000.kext/Contents/Info.plist

Caveat – so far it only works on nmp as eGPU, some code that is checking for nmp is in place.

More here – Forum post

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macOS 10.12 brings new amd drivers same old nvidia drivers

amd drivers has new amd9500Controller.kext which is for polaris gpus (0x67E01002 0x67FF1002 0x67C01002 0x67DF1002)

amdRadeonX4000.kext has new graphics accelerator – AMDBaffinGraphicsAccelerator (Polaris 11)  (0x67E01002 0x67FF1002 0x67EF1002)

still no fiji accele support, Polaris 10 only framebuffer support, Polaris 11 has full support – apple is working on some new macs with Polaris 11 included, AMD today announced new cards as well, RX460 (P11 based), RX470/RX480 (P10 based)


nvidia – new driver finally, but still no GM100 kext, so no maxwell.  355.10.05b02

Come on Apple, improve your 3d drivers

Few tests with same config (R9 290x, MP3,1, 2×2.8 GHZ cpu) in Unigine Valley. I know this cpu sucks for valley, but it’s enough to compare different OS/drivers.

(Read the article)

We have eGPU subform openned

Btw, we have eGPU subform now at to tell more about using eGPU in OS X via ThunderBolt

Join us.

egpu mini

New imacs…

M290X is radeon HD 7870 but at lower 900 mhz core clock. A bit slower than 780M you can find in current Imac.
and it comes with 2 gigs of vram, kidding?

M295X is some tonga chip, probably full tonga chip ( equal to 7970). Will be like one D700 of newMacPro.
4 gig vram here.

That’s too weak to play anything at 5K, they even will struggle at 2560×1440. Only for 1080p gaming.

Little Teaser

go here

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