Mac mini shutting down unexpectedly

My Mac mini shuts down on its own if it's not being used for a while. This causes me problems. A notification pops up (see attached screenshot), then shuts the system down shortly after. What's going on?

Mac mini, macOS 15.5

Posted on Sep 25, 2025 10:11 AM

Reply
2 replies

Sep 25, 2025 11:03 AM in response to JimClark77

1) Automatic Computer Sleep Mode is causing a sleep/shut down problem for some setups.


As a test:


Turn On "Prevent automatic sleeping when display is off"



Set "Turn display off when inactive" to 5 or 10 minutes



Leave the Mac Mini On and only allow the display(s) to turn Off

Do not manually Sleep from the Apple Drop Down menu

Shut Down the Mac when away for a day or more


I wouldn't count on it, but solution may come if enough folks send Feedback.

Feedback - Mac mini - Apple

Feedback - macOS - Apple


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2) If your Mac mini is running 15.5 as shown in your profile..?


Updating to the latest macOS 15.7 could possible fix the sleep/shut down issue.

What's new in the updates for macOS Sequoia - Apple Support


Sep 25, 2025 11:40 AM in response to den.thed

den.thed wrote:

1) Automatic Computer Sleep Mode is causing a sleep/shut down problem for some setups.

As a test:

Turn On "Prevent automatic sleeping when display is off"
Set "Turn display off when inactive" to 5 or 10 minutes
Leave the Mac Mini On and only allow the display(s) to turn Off
Do not manually Sleep from the Apple Drop Down menu
Shut Down the Mac when away for a day or more

I wouldn't count on it, but solution may come if enough folks send Feedback.
Feedback - Mac mini - Apple
Feedback - macOS - Apple


Mac mini shutting down unexpectedly

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