MP All Models Mac shutting down if not logged into

[drcpub]

I was wondering if a mac is designed to shut down after starting up, if not logged into after a certain time. Example: I turn it on, walk away and come back 1/2 hour later, and the mac turned off. Is this normal? 2013 mac pro

 

[Bigwaff]

Are you sure it’s not going into sleep mode? Do you literally have to reboot it, e.g. hear startup chime?

 

[Macschrauber]

Yes,

Odd power saving situations could come from the rtc battery, time to check it.

 

[Bigwaff]

Odd power saving situations could come from the rtc battery, time to check it.

Good call but there really is no “check”. It’s disassemble and replace battery in order to “check”. The iFixIt guide is super helpful but be sure to read the comments.
https://www.ifixit.com/Guide/Mac+Pro+Late+2013+CMOS+Battery+Replacement/21216

 

[Macschrauber]

There is a measure point to get the voltage, readings below 3.0 volts means better replacing, readings below 2.8 volts means replace now ;-)

edit: it was posted before: https://forums.macrumors.com/threads/mac-pro-wont-turn-on.2393011/

https://forums.macrumors.com/threads/mac-pro-wont-turn-on.2393011/post-32255633