MacPro 6,1 goes to sleep while working

[tudorpaslaru]

Hi, I have two problems with MacPro 6,1.
1.
While working hard, editing video or rendering it may go to sleep even if energy setting is set for no sleep. Hard disks and display are also set for no sleep. Sometimes it will wake up after pressing any key. But sometimes it wont so I have to restart it by pressing the power button.

Config
Sierra 10.12.6 (it happened on Yosemite and El Capitan too)
xeon 2.7
ram 64gb
D700

Thunderbolt connections:
1. one thunderbolt display
2. blackmagic ultrastudio 4k
3. pegasus R8 raid
4. Promise SANLink 10GB

All on different buses.

2.
Also, sometimes, the fans are going mad, the computer is very slow and the kernel task in activity monitor shows about 80-90% CPU usage. This is happening randomly, while watching youtube for example or writing in microsoft word.

If someone knows the reasons of this problems, please help.

Thanks in advance

 

[tomvos]

Perhaps your Mac suffers from the same problem described in this thread.

Regarding the sleep while working issue … on my older Mac Pro 5.1 I use caffeinate to make sure the system does not go to sleep. Just open a Terminal and type "caff" and hit the TAB key to complete the command. Then press return. The Terminal does not show any feedback. To stop the caffeinate command, just type CTRL-c. If you want to avoid the display and disks from sleeping too, type "caffeinate -dim"

Might be worth a try.