IMDPersistenceAgent process uses near 100% CPU continuously. Why?

My M1 Mac Mini with MacOS 26.0.1, Activity Monitor app shows unfamiliar process IMDPersistenceAgent using near 100% CPU continuously, for User me. This is a recent oddity that I never saw before. Is this acceptable behaviour now? My similar M1 iMac does not show it.

Both Macs are idling not doing any work for me. This M1 Mini is running Safari for this query, and the iMac is idle with a Preview window viewing a document.

Mac mini, macOS 26.0

Posted on Oct 7, 2025 10:41 AM

3 replies

PTRiPad1 Author

Level 1

10 points

Oct 7, 2025 2:34 PM in response to PTRiPad1

After I restarted my M1 Mac Mini, process IMDPersistenceAgent is now taking 0% CPU time, and overall the Mac Mini is back to being 98% idle as before this odd incident.

So I will try to ignore this oddity and return to my regular distractions.

den.thed

Level 10

89,566 points

Oct 7, 2025 11:53 AM in response to PTRiPad1

Have a look at > IMDPersistenceAgent hogging CPU since Son… - Apple Community

and > IMDPersistenceAgent running around 65% of… - Apple Community

den.thed

Level 10

89,566 points

Oct 7, 2025 5:01 PM in response to PTRiPad1

You're welcome.

IMDPersistenceAgent process uses near 100% CPU continuously. Why?