New Mac Pro shuts down when I put it to sleep?

sounds like there are multiple issues, this has fixed mine, and i have managed to reproduce and fix several times over as a test on my machine,

might help some though. I only figured mine out as it was doing it overnight every night all the time, so figured there must have been something on a timer that was causing it.

@mac simon: Happens to us all :-)

That made the trick, thanks, now time will tell if it works for me as well.

Ha, 1st test/night 6h and no shut down... looks great this mac simon :-)

Another test with another boot drive (internal SSD OS X 10.10) and it didn't make any difference... Was semi-shut down when home from work.

Semi shut down as it reacts on mouse to wake it up, but reloads all menu items and all open apps that stopped after about 4 hours.

Strange this is.

Rem: The post above I used an external Thunderbolt drive running OS X 10.10 and Windows 8.1 via Parallels Desktop and Boot camp.

In my case it was a hardware malfunction, i had to send my mac pro to Apple (accordingly to the hotline it went to the development department by request, for testing, they took the matter pretty serious) and got i a brand new one (in may 2014) ... since then, the problem has gone.
No more random shutdowns caused by crashes in sleep mode.

Hmmm, should perhaps call them also :-/

I would recommend you to do so, i tried everything for weeks, checked every external device, unplugged everything, reinstalled OS, installed every app step by step and had to wait and wait, to see if the problem is still there ... sometimes it disappeared for some days.
One day i finally had enough and called Apple. I had to wait 4 weeks for the new mac, because of the high demand, but that shouldn't be a problem any more ; )

In my case those shutdowns were defintly caused by crashes, every time i rebooted the mac after a sleep mode break-off, the OS showed the well known notice because of the crash.

Well, I can't say it crashes for me, it just will not stay up running after the screen shuts down after about 1h after I left it and after 3-4 more h the MP semi-shuts down as well and stopps all running apps, and I need it to keep running as I several apps running while away and don't want the screen to be on when not there to save both the screen and energy....

Hi mac simon,

unfortunately after some weeks of testing/checking your tip doesn't seem to work for me, but in the same"pmset -g" command there is also a "autopoweroff 1" result. Would it be ok to change that to 0 (zero) you think?

I figured it out! in settings under the General tab in Security & Privacy, click on the Advanced button in the lower right corner. There you will see the option of log out after ____ minutes of inactivity. Uncheck that and you should be good to go!

I figured it out! in settings under the General tab in Security & Privacy, click on the Advanced button in the lower right corner. There you will see the option of log out after ____ minutes of inactivity. Uncheck that and you should be good to go!

I figured it out! in settings under the General tab in Security & Privacy, click on the Advanced button in the lower right corner. There you will see the option of log out after ____ minutes of inactivity. Uncheck that and you should be good to go!

I have just started having this issue as well. seems to just turn off at random while asleep.

Gerald Gifford wrote:

Almost identical problem. Happens about 95% of the time.

Don't know if there's a connection, but my auto shutdown problem has disappeared since I added a significant amount of RAM.

jerry

In settings under the General tab in Security & Privacy, click on the Advanced button in the lower right corner. There you will see the option of log out after ____ minutes of inactivity. Uncheck that and you should be good to go.