24" iMac Screen Freezes since 10.6.3 update - pls help!

Thanx for your reply.

Mine

iMac 8.1

24" ati Radeon hd2600pro 256

I just installed ML Gold again and updated to 10.8.4.

Applied the kext fix on the 10.8.4 (kext helper, still hangs aftewards) and it rebooted fine and works fine.

I think Apple will bring the solution for this machine in 10.9! (not!!!!)

Has anybody tried this?

http://blog.djmnet.org/2011/02/03/snow-leopard-crashes-on-a-24-imac/

'The video chip (GPU) in mine is an ATI Radeon HD 2600 Pro. Apparently Snow Leopard drives the GPU harder than Leopard does, but runs the iMac’s fans at the same barely-audible speeds. The problem is more likely to occur on iMacs that are left on all the time, as mine is.

The solution is to install a third-party fan control program to force the fans to run faster and keep the inside of the Mac cooler. I installediMac Fan Control. The iMac’s fans are now audible, but not too objectionable, and it hasn’t crashed in the two months or so since I installed iMac Fan Control.'

@DataRusty

A lot of people have tried different solutions. The problem indeed is the Videocard. Probably a change in driver after 10.6.3. Cooling the video card more could also help but....

Installing the 10.6.3 KEXT is the proven solution and everything works fine. Video speed is good, dimming works, sleep works an th iMac is quiet!

The good news is that the 10.6.3 Kext also work on 10.8.4

Download them here:

https://dl.dropbox.com/u/90315541/Krysztof%20Turek%27s%20Fix.zip

So - not too get anyone TOO excited, but I've had these freezing issues since 10.6.3 just like everyone else.

Good news...I've heard that Apple may have FIXED THIS ISSUE for the upcoming OS.

I have gotten reports of people running for 2 weeks now with no freezes at all, and this is WITHOUT the kext fix.

Fingers crossed everyone, I think Apple squashed this bug when they rewrote the OpenGL drivers.

Older iMac graphic cards are running far, far cooler and have not had any issues at all.

😀

Great news! But this thing is weird and unpredicable.

Which Mac are you using? Mine: ATI Radeon HD 2600 Pro 256 MB. I purchased Moutain Lion a long time ago, but haven't yet installed it. Let us know if the success continues.

Does anyone know if there is a similar fix for the early 2009 imacs that are fitted with the NVIDIA GEFORCE GT120. I have this machine and have the EXACT same problem as you guys 😟

Been destroying my system for nearly 2 years now.

Any help appreciated.

🙂

EDIT: I see in Mavericks apple will be supporting OGL4 as opposed to OGL 3.2 which is currently supported by lion.

My particular care is an OGL 3 card as mentioned above: NVIDIA GEFORCE GT120. Does this mean I may have some luck finally with them fixing it i.e are they REWRITING OGL or just adding support for OGL4? Or does adding the support for 4 require a total rewrite anyway?

http://www.geforce.co.uk/drivers has a new driver for the 120 but not for the 130

Many thanks.

Is this for iMac though or just mac pros?

Also where would I find the new one? The only driver that comes up when I follow the search options on that link is below, and I can't install it:

Quadro & GeForce Release 304.00.05f02

Version: 304.00 - Release Date: 2 October 2012

Thank you so much! These posts returned a piece of metal back to an working iMac!

I really assumed the erreor to be a hardware bug. But it's software. Restored old graphic driver and it works again. After 2 years of maintenance ..

Btw: Is there an updated driver by ATI/AMD for the ATI Radeon HD 2400 XT with 128 MB RAM?

Thanks!

Anyone?

Any chance 10.8.5 fixed the video driver so we no longer need the kext hack?

Also hoping to hear from you all. Who has installed the 10.8.5 on a 24" iMac HD2600 or 2400

I sold my iMac 24" to a friend.

Does the 10.8.5 fix the freez problem with the Radeon HD2600 and HD2400 (probably not)

Does the kext fix still work

10.8.5 has been on my system for three days. So far its stable 😉.

Cheers.

@tomasz17

Did you use combo update or the Delta update (appstore)?

And what is your system.

I'm into my 4th day of running 10.8.5 with no issues at all. I have the ATI Radeon 2400HD in a mid-2007 iMac. I installed via the Combo updater, not the Delta via App Store. I'm pushing the iMac hard around the clock, doing everything I can to try to force the GPU crash, but it's rock solid so far. This machine hasn't run so well since Leopard. I hope I'm not jinxing it by reporting too soon. I seem to recall that I went for 10 days after installing 10.6.7 before it crashed, so we'll see. I can't report on the kext fix because I haven't needed it yet. I hope I don't. My gut feeling is they finally got it right.