Q: iMac randomly restarts from sleep
iMac 27-inch, Late 2012
processor: 3.4GHz Intel Core i7
Memory: 24GB 1600MHz DDR3
graphics: NVIDIA GeForce GTX 680MX 2048 MB
HDD: Fusion Drive (1TB)
Yosemite 10.10.4
Hello,
I've already searched for my problem - my iMac randomly restarts on its own after sleep - but haven't find any viable solution.
The issue:
- the computer restart on its own from sleep - this happens during daytime or night, no difference in the time of the day;
- no problems when I shut it down (in that case it doesn't restart on its own);
- I don't receive any "kernel panic" warning or similar messages - it just restarts
- I can't recall an event (new app installation or similar) that might have triggered the issue
- the iMac is connected to the same power source since I bought it (more than 2 years ago) but the problem arose in the last three months or so.
What I've already done:
- I have reset my SMC a couple of times
- I have reset my PRAM a couple of times
- I ran Disk Utility and both the Disk and Permissions are fine
- I ran Apple Hardware Test and no issues were found
- I restarted in Safe Mode (in my account, not a guest account)
- I uninstalled Tuxera (the app for NTFS read-write on external drives)
- I unplugged all external HDD's (USB and Thunderbolt)
- in System Preferences I unchecked "Wake for Network access"
but the issue is still there.
Any thoughts?
Thanks
iMac (27-inch, Late 2012), OS X Yosemite (10.10.4), 24 GB RAM, Fusion Drive, 2 GB card
Posted on Jul 25, 2015 9:00 AM