i take that back.
been on the wrong track. Apple changed the kext names as they are displayed in the kextstat output, however the files are still named as they were back in 10.6.2. so it loads them by their original names.
so basically i was wrong, if you put the old files there, it will load it. the 10.8.2 drivers are displayed as AMDxxxxx
the old ones as ATIxxxx
so it was me who got confused. :-(
Utilites/System Information shows the right names and the file path as well, and it's clearly visible that it still loads the files by their old names.
iMac Model Identifier: iMac7,1 Processor Name: Intel Core 2 Duo Processor Speed: 2 GHz Number of Processors: 1 Total Number of Cores: 2 L2 Cache: 4 MB Memory: 4 GB Bus Speed: 800 MHz Boot ROM Version: IM71.007A.B03 SMC Version (system): 1.20f4
Currently running 10.7.5 with no more issues after kext fix. Thank you KrzysiuTurek for coming up with the solution and CWGuide for posting the detailed instructions. I hope that everyone is downloading to Apple Bug Fix. I also hope that you both get 10 points because IT SOLVED MY PROBLEM!! Thank you so much for making my iMac useful again!!!
So I have spent the last 48 hours in this thread after having very similar symptoms. Thanks to all who have contributed such a large amount of assistance. Unfortunately, the fix is not working for me. Briefly:
Mac Pro 2008(3,1), Mountain Lion. Tried the kext fix,the original ATIRadeonX2000 (8.0.0) does not show up at any time using "kextstat | grep ATI", but it is in the system/extension folder when I look. Have done all the permission repairs, cache fixes etc but still get the grey screen if I try to a normal startup. Safe boot works and in the console I can see the ATRadeonX2000 is not loaded.
If I remove the ATIRadeonX2000.kext the Mac will boot up but with graphic weirdness. I have reinstalled ML twice (not a clean install). As I see it my options are now:
-clean install of ML
-replace graphic card
Sorry, I should have been more specific about my problem. I think that is part of the reason why this is an 85 page forum, people are talking about different types of screen freezes. My screen freeze on an older iMac (2007) is characterized by only being able to move the mouse cursor; nothing else on the screen is responsive (not a gray screen) and the issue can only be resolved by hard reboot. The console errors are always the same, with an infinite listing of kernal errors:
kernel: ** Device in slot: SLOT--1 **
kernel: ** GPU Debug Info Start **
Once again, my hardware configuration is listed below and I am running Lion 10.7.5. The issue first emerged when upgrading from Leopard to Snow Leopard so it has been recurring for over a year.
Model Name: iMac Model Identifier: iMac7,1 Processor Name: Intel Core 2 Duo Processor Speed: 2 GHz Number of Processors: 1 Total Number of Cores: 2 L2 Cache: 4 MB Memory: 4 GB Bus Speed: 800 MHz Boot ROM Version: IM71.007A.B03 SMC Version (system): 1.20f4
Several others on this forum have reported that this type of error is resolved by the kext fix. It would be great is someone could separate the different types of screen freezes that are listed in this forum into different threads (sorry, I don't know how to do it).
I have the same machine, same Boot ROM version. and the Kext Helper worked for me. I had problems getting it to work until I found specific instructions and followed then EXACTLY. You can get the instructions at the link below. I had additional problems with font conflicts, but 99% of my problems were with ATI2400 and support files. You need the Kext Helper to install all the necessary files. Good luck
Biotech guy, I have a mid-2007 iMac (20") with the exact specs that you posted here, and was seeing the exact same symptoms -- a frozen machine, with visuals intact (not a grey screen), and my problems were 100% resolved by following the routine described on page 28 of this thread (see attached link) by CWGuide. If an intial stab at it didn't work, maybe try reinstalling Mtn Lion and then running through his steps again? For me it's been like magic. I'd been suffering this seizing since installing Lion, but have not had any problems whatsoever since following CWGuide's steps.
what kind of GPU do you have? macpro means discrete GPU. do you really have an ati2400 or ati2600 PCIe card? why don't you get a bit beafier one, like 4850 or something? it must not be genuine apple.
check out netkas' place (http://netkas.org), you can find lotsa useful information and custom roms for non-apple branded GPUs.
on the other hand, it still need to be a "supported" one, by supported i mean, even netkas can't turn water to wine, the drivers always come from apple. the custom roms just enable you to use an oem hd4850 (by gigabyte, sapphire or asus) or a bunch of other GPUs what are also sold by apple in your macpro. it costs a lot less than the "genuine" silver coloured apple ones.
back to your issue. apple tweaked the driver in 10.8 naming. i got confused too. you see in /S/L/E ATIwhatever.kext, there are a bunch of them. however because of info.plist inside them, some of them show up as AMDwhatever. for example the kexts needed for the 2400/2600 GPU freeze issue, are ATISupport, ATI2400Controller and ATIFrameBuffer, and since 10.8.2 they show up as AMDSupport/AMDFrameBuffer, and so on. ATIRadeonX2000 is however a cuckoo's egg. we need to use the most recent one, and the filename (ok, folder name) and how kextstat displays it, are the same.
go and check whether "kextstat | grep AMD" produces any output.
so i suggest to doublecheck what kind of GPU do you have in your macpro.
clean install will not help. (sacred druid rites, root magic, whatever)
usually no app touches your system drivers.
repairing permissions will only help, if you (un)intentionally changed the permissions: e.g. kext files are not owned by root:wheel, no extended attributes, dirs have 0755, files inside dirs have 0644 permission bytes.
in case they don't, OSX will not load those kexts, thinks they are not safe to load. nor will kextd use them to
build the kextcache. but it just doesn't go under the radar. you should be able to spot some messages in /var/log/system.log (like foo.kext failed to load, or something similar).
if you have the same issue that we have, and the 10.6.2 kexts does not help you, then you can still
get another GPU. you should be able to get some better one under $100 w/o any problems. like ATI4850 or 5770, or even better ones. just check what is available in apple's range (http://store.apple.com/us/browse/home/shop_mac/mac_accessories/displays#m.produc tKind=graphic_cards), and look for the same models at netkas, to find out whether there's a modded rom for them. then go and buy one in the nearest pc-shoppe. it will be a lot easier, compared to our mxm-whatever based GPUs.
plz report how it worked out, as i see, you are kinda first with a macpro around here, sharing the same fate.
Hi swmaster, thanks for your detailed reply, didn;t realise I was the first Mac Pro to have this problem. yes it's the ATI 2600 card. I have tried everything under the sun on these pages in all different combinations, to save further damage to the cat and family I have ordered a new GFX card which will hopefully be here in a couple of days. As a 20+year Mac user though this has really dented my confidence in Apple.
still the same problem here, no solutions (after 85 pages)
early 2009 imac 3.06Ghz with GT130.
a friend of my with the same apple, same problems is now running windows on it. no problems at all!!
so is it a hardware or software problem ???
im running 10.6.8 and smcFanControl but that is not the anser. crashing 3 times a day.
what is the best thing to do ??