iMac randomly shuts off

[amateurist]

I've got a late 2013 iMac that since this morning suddenly shut off.
To turn it on again I had to wait a few minutes before I was able to use the power button and then after 10 minutes or so it shut off again.

When I look in console it says: kernel: Previous Shutdown Cause: 0

I ran the AHT, but no results.

Also did a PRAM reset but it's still shutting off.


these are the specs:

NVIDIAGeForceGTX780M 4GB GDDR5
3.5GHz Quad-core Intel Core i7
32GB 1600MHz DDR3 SDRAM-8GB
1TB Fusion Drive

any idea how to solve this? thanks

 

[BrianBaughn]

Are you running any non-OS X background apps (cloud syncing, backup, VPN, password, remote access etc.)?

 

[amateurist]

Are you running any non-OS X background apps (cloud syncing, backup, VPN, password, remote access etc.)?

i have a vpn running but not sure if that's to blame since sometimes the imac also turns off during start up before any of that has had a chance to load

 

[BrianBaughn]

i have a vpn running but not sure if that's to blame since sometimes the imac also turns off during start up before any of that has had a chance to load

Probably not the issue then.

From what I've seen "Previous Shutdown Cause: 0" is a power failure. Doesn't narrow it down much, though.

Those kind of shutdowns can cause software issues such as directory corruption.

I've heard about iMac shutdowns being caused by hardware failures. A faulty hard drive or hard drive connector is a possibility. The equivalent of a "short circuit" somewhere.