Decii Posted September 26, 2012 Share Posted September 26, 2012 As per title. I've been trying to install ML using 3.1.2 but the installer just keeps rebooting before getting to the ML install screen. I've been using myHack for over a year now on the same system with Lion. I've tried putting the working Lion graphics kexts (ATIRadeonX2000.kext and ATI4800Controller.kext) into /s/l/e AND into the EXTRA folder and then running 'myFix'. Nothing I do is changing the constant rebooting. Is this a case of Mountain Lion absolutely under no circumstances being able to support the HD4850? Any help? Cheers. system in my sig. Link to comment Share on other sites More sharing options...
Conti Posted September 27, 2012 Share Posted September 27, 2012 Replacing graphics subsystems with backports is not trivial in ML as lion simply does not function the same way. I suspect there are other extensions at play here which you have not considered. Yes it is a case of ML not supporting the framebuffer for your graphics device, but there may be a solution... though it may require considerable effort on your part. Easy solutions: Stick with Lion until your next upgrade or swap your graphics device with something known to work. Advanced solutions: Dig into the graphics subsystems further and find a way to get your device to initialize. Sorry I can't help more than that... I have no experience with HD4xxx series graphics. Link to comment Share on other sites More sharing options...
Beta1382643440 Posted September 28, 2012 Share Posted September 28, 2012 Netkas has a 48xx exotic kext update for 10.8.x and it works fine for my 4850. Just make sure that you have the device ID's present in the two kexts. Link to comment Share on other sites More sharing options...
Conti Posted September 28, 2012 Share Posted September 28, 2012 I didn't know that Beta, it's been a while since I've had a look at netkas' blog, good to know. Link to comment Share on other sites More sharing options...
Beta1382643440 Posted September 29, 2012 Share Posted September 29, 2012 The release was a bit late after 10.8 was released by it works well. I have a side build that I use and it works well with that GPU. I had HDMI audio working in 10.7 but I never tried to look at it in 10.8 Netkas has not made many post as of late... not sure why. Link to comment Share on other sites More sharing options...
Decii Posted September 30, 2012 Author Share Posted September 30, 2012 Netkas has a 48xx exotic kext update for 10.8.x and it works fine for my 4850. Just make sure that you have the device ID's present in the two kexts. I appear to have ML version 12A251. I have tried the Fantomas kexts labelled as version 12A269 but they do not work for me. I can't find any kexts by Netkas. Tonight I will download the latest ML version (hopefully 10.8.2) and try the newer kexts by fantomas. Cheers for your help. Link to comment Share on other sites More sharing options...
Beta1382643440 Posted September 30, 2012 Share Posted September 30, 2012 HERE: http://forum.netkas.org/index.php/topic,3210.0.html Link to comment Share on other sites More sharing options...
Decii Posted October 3, 2012 Author Share Posted October 3, 2012 HERE: http://forum.netkas.org/index.php/topic,3210.0.html Yes, those are the kexts I tried, thanks. I downloaded ML 10.8.2 and then tried the latest 10.8.2 kexts from fantomas but the story is the same with the rebooting I don't know what else to try. Maybe it's something other than those two kexts. Cheers for the help though. Link to comment Share on other sites More sharing options...
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