Process appstoreagent using 100% CPU in MacOS 27.0.1

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Level 1

31 points

Process appstoreagent using 100% CPU in MacOS 27.0.1

After upgrading to 27.0.1 every morning I wake up to an overheated MacBook Pro due to the process appstoreagent running at 99%. I have seen a discussion of this on MacRumors at https://forums.macrumors.com/threads/high-cpu-usage-due-to-processes-appstoreagent-and-dasd-exactly-between-midnight-and-9-am.2490572/. The opinion there is that this bug started with 27.0 (which I had not run on my laptop) and there had been hopes that 27.0.1 would have fixed it, but as far as I can tell it hasn't. That thread on MacRumors provides a workaround, which I've tried but found it didn't work for me. I have registered a bug report at Apple's feedback site, but of course you never hear anything back from Apple when you do that. Has anyone else seen this? Does anyone have a workaround other than the one on MacRumors? It is quite annoying!

MacBook Pro (M5, 2025)

Posted on Oct 28, 2026 2:47 PM

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Answer 1

Oct 28, 2026 3:11 PM in response to lp1756

The very first thing you should probably do is update to 27.2 which released this week.

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Answer 2

den.thed

Level 10

98,810 points

Oct 28, 2026 3:13 PM in response to lp1756

macOS 27.2 Golden Gate is the current version. Update to it and test for a day of two.

What's new in the updates for macOS 27 Golden Gate - Apple Support

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Answer 3

lp1756 Author

Level 1

31 points

Oct 30, 2026 5:30 AM in response to lp1756

Update: 27.2 appears to have solved the problem. I've had two mornings without the problem and it had been consistently there before the upgrade. Thank you to those who provided help!

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Answer 4

etresoft

Level 9

60,664 points

Oct 28, 2026 5:32 PM in response to lp1756

lp1756 wrote:

Has anyone else seen this? Does anyone have a workaround other than the one on MacRumors? It is quite annoying!

Yes. I saw it just the other day. In my case, it wasn't appstoreagent, just dasd. It also consumed about 460 GB of storage. I fixed it with this:

kill -9 <PID for dasd>; rm -Rf /private/var/db/DuetActivityScheduler; rm -Rf /private/var/db/powerlog/Library/PerfPowerTelemetry/BackgroundProcessing; rm -Rf /private/var/db/DuetActivityScheduler;

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Answer 5

lp1756 Author

Level 1

31 points

Oct 28, 2026 5:41 PM in response to Randall_2023

Thanks for the info. Just two days ago I installed 27.0.1 by clicking on the update-tonight button which showed 27.0.1 as the next release. Didn't know there was already a 27.2. Odd that the Software Update dialog recommended 27.0.1, but there it is. I'll update to 27.2 tonight and post my findings on this bug after a day or so. Thanks again.

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