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"triald" process preventing sleep on Mac Mini since Big Sur update

After updating my 2018 Mac Mini the system is working fine, however, when it goes to sleep and then subsequently wakes up for it's power nap, there are two "UserEventAgent" processes that are preventing the system from going back to sleep.


These agents appear to be getting called by a deamon called "triald" and when running "pmset -g assertions" you can see the following :


Listed by owning process:

   pid 19050(UserEventAgent): [0x00014dc1000b8f37] 00:04:20 BackgroundTask named: "com.apple.triald.client-trigger.cellular"  	Created for PID: 19184. 

   pid 19050(UserEventAgent): [0x00014dc1000b8f36] 00:04:20 BackgroundTask named: "com.apple.triald.client-trigger.wifi" 	Created for PID: 19184.  


I have also updated my MBP with Big Sur, and while the triald process does run, there are not the same UserEventAgent process holding them open.


I can't find anything in regards to this process, apart from it appears to be part of an iOS framework kit, but I am not a developer and don't have any iOS SDKs installed. I also don't use the WiFi interface on my Mini as it is plugged direct into the ethernet, so I am curious as to why it it trying to perform some sort of action on the wifi and cellular interface (which I'm pretty sure a Mini doesn't have).


Can anyone shed some light on what this process is and why it is preventing the system from going to sleep. This has only started happening since updating to Big Sur.


Is it something in my user profile that is causing it ? The reason I say that is because when I log in to the same machine using a different account (one created just for this purpose) the same UserEventAgent running the triald processes don't start up.


Any help would be greatly appreciated.

Mac mini, macOS 11.0

Posted on Nov 21, 2020 4:16 AM

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"triald" process preventing sleep on Mac Mini since Big Sur update

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