HELP! iMac keeps freezing

[trodat]

I upgraded from 10.5.8 to 10.6.8 today (without a disc) and my computer now freezes. The mouse cursor still moves but everything else is frozen (cant choose an app etc, etc).

This has not happened before. I'd rather not go back to 10.5.8. as I wanted better quality apps but if that is what I need to do then so be it. Would really appreciate your help

 

[Intell]

What iMac do you have and what video card is it?

 

[trodat]

What iMac do you have and what video card is it?

Hardware Overview:

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: 3 GB
Bus Speed: 800 MHz
Boot ROM Version: IM71.007A.B03
SMC Version (system): 1.20f4
Serial Number (system): W8743DBMX85
Hardware UUID: 00000000-0000-1000-8000-001B63AF6602



ATI Radeon HD 2400 XT:

Chipset Model: ATI,RadeonHD2400
Type: GPU
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 128 MB
Vendor: ATI (0x1002)
Device ID: 0x94c8
Revision ID: 0x0000
ROM Revision: 113-B2250A-207
EFI Driver Version: 01.00.207
Displays:
iMac:
Resolution: 1680 x 1050
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
Display Connector:
Status: No Display Connected


Hope that is the right information! Thanks,

 

[Intell]

I'm sad to say, but you have the dreaded ATI 2400/2600 GPU crash bug. Here's a whole thread about it: https://forums.macrumors.com/threads/1262891/ In summation, there's no real fix (yet).

 

[trodat]

I'm sad to say, but you have the dreaded ATI 2400/2600 GPU crash bug. Here's a whole thread about it: https://forums.macrumors.com/threads/1262891/ In summation, there's no real fix (yet).

Solution in the meantime? Can I go up to or do I have to go back down i.e to 10.5.8.

 

[Intell]

Some people have reported that their iMacs work fine on 10.6.3, others it's 10.6.6. You can go back down to 10.5.8 if you want, it shouldn't freeze anymore for you.