We have a rash of people needing help with sluggish Macs on 10.15.6 and 10.15.7

The best technical explanation of this is that some, but not all people get this daemon taking multiple cores of CPU and not sorting itself out.

I don't want to just copy all of the details from that post, but I think the triage steps there are amazing, so I'll likely adapt it and give credit in one or two posts later this morning.

Now, for us - how should we be deciding on duplicate questions so that people that had issues in the past 10.10 and have answered a lot, get a good new answer. What strategy on linking / closing serves people needing an answer this week and next week?

1 Answer 1


My gut reaction is we should pick one of the new questions and update an answer and link to the old question since Apple clearly had a rash of this in late September where the daemon was triggered and other breakage happened.

Not everyone needs to reset NVRAM, but for some that works. Not everyone fixes it with a reboot, some do. Most can now just patch and presumably things will quiet down.

There's a fix from Apple now - I've added it to the top of this answer:


  • The fix for this on Mojave is to install the 10.14.6 Supplemental Update - build 18G6032
  • The fix for this on Catalina is to install the macOS Catalina 10.15.7 Update - build 19H2

After the reboot - check for build versions and that no OS updates are available. You don't need to delete any accounts or keychains or internal database files if you can patch your Mac with the Apple fixes.

Here’s another short answer with the info: https://apple.stackexchange.com/a/402553/5472

  • 2
    I would agree with this approach. Also, perhaps, that question can get the 'canonical-questions' tag.
    – fsb
    Commented Oct 2, 2020 at 14:09
  • Still exists on 10.15.7!
    – Dr.jacky
    Commented Oct 5, 2020 at 8:31
  • After installing the combo updater on top of 10.15.7? @Dr.jacky
    – bmike Mod
    Commented Oct 5, 2020 at 20:16
  • @bmike I've not downloaded the combo manually but, the OS is 10.15.7 (19H2) already.
    – Dr.jacky
    Commented Oct 6, 2020 at 10:09
  • We had to run the combo after upgrading to fix this ( or delete any full Catalina installers and download a new one and install that on top @Dr.jacky )
    – bmike Mod
    Commented Oct 6, 2020 at 10:12

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