Hi,
I have a late 2012 iMac with 3.4 i7 CPU, 32GB RAM, 2GB GTX 680MX, 3TB Fusion Drive.
Since I brought it in mid 2013 it has constantly locked up. It usually manifests itself as the screen locking up and then after a minute or so it reboots.
There is nothing in the logs no errors or warnings. This happens with a clean install of OSX so its unrelated 3rd party software. It happens with OSX 10.8, 10.9 or 10.10.
I have completely wiped including rebuilt the Fusion Drive (recreated the CoreStorage Logical Volume) and reinstalled OSX on multiple occasions.
I have ran the Apple Hardware Diagnostics including the extended tests on multiple tests and it always passes. It also never freezes or locks up.
I have switched memory 3 times and ran the memtest86+ extended tests without issue.
I took it in last year and they replaced the bluetooth controller but that made no difference. I have bluetooth and wireless disabled so I doubt its related to those. I've disabled power management and reduced transparency settings as I read somewhere that could cause the issue but makes no difference.
Anyone else experience similar issues and successfully resolve them?
Thanks
I have a late 2012 iMac with 3.4 i7 CPU, 32GB RAM, 2GB GTX 680MX, 3TB Fusion Drive.
Since I brought it in mid 2013 it has constantly locked up. It usually manifests itself as the screen locking up and then after a minute or so it reboots.
There is nothing in the logs no errors or warnings. This happens with a clean install of OSX so its unrelated 3rd party software. It happens with OSX 10.8, 10.9 or 10.10.
I have completely wiped including rebuilt the Fusion Drive (recreated the CoreStorage Logical Volume) and reinstalled OSX on multiple occasions.
I have ran the Apple Hardware Diagnostics including the extended tests on multiple tests and it always passes. It also never freezes or locks up.
I have switched memory 3 times and ran the memtest86+ extended tests without issue.
I took it in last year and they replaced the bluetooth controller but that made no difference. I have bluetooth and wireless disabled so I doubt its related to those. I've disabled power management and reduced transparency settings as I read somewhere that could cause the issue but makes no difference.
Anyone else experience similar issues and successfully resolve them?
Thanks