#2791 ✓closed
Giovanni Lanzani

High CPU (ß 5757)

Reported by Giovanni Lanzani | March 30th, 2021 @ 07:41 AM


I saw some past issues about this, but they were pretty old.

Very often — also when idling by looking at Mailmate Activity pane — I see very high CPU usage on Mailmate.

On the latest 16" Pro, I see something like 70%.

My mailboxes are not very large (100k messages), and I don't have smart folders/rules besides the standard ones I believe.

How can I help you diagnose this?

Comments and changes to this ticket

  • Giovanni Lanzani

    Giovanni Lanzani March 30th, 2021 @ 10:13 AM

    To maybe add some extra bit of info: Window Server also seems to spike together with MM

  • benny

    benny April 12th, 2021 @ 12:30 PM

    You can help me by generating samples. When CPU is high, run the following Terminal command:

    sample MailMate 10 > ~/mailmate_sample.txt

    Then send me the file(s) using “Help > Send Feedback” and reference this ticket.

  • Giovanni Lanzani

    Giovanni Lanzani May 17th, 2021 @ 09:41 AM

    Since the latest beta, I cannot reproduce this behavior anymore. We can close it maybe?

  • benny

    benny May 17th, 2021 @ 04:09 PM

    • State changed from “new” to “cantreproduce”

    Thanks for letting me know. I'm a bit unsure if I actually did anything which could explain why this no longer happens. Let me know if the issue returns.

    (Sorry about the spammer adding to the ticket.)

  • Oleg

    Oleg February 6th, 2022 @ 11:31 PM

    • State changed from “cantreproduce” to “new”

    Hi. I'm seeing the same issue with CPU usage now. Occasionally MailMate would start using 60-70% when seemingly idle (at least nothing is happening in the UI – I even switched to an empty account to remove any rendering woes). If I restart MailMate at this point, the issue goes away and MailMate backs down to <10% CPU.

    I captured a sample as advised above - here it is attached to this message.

  • Tom Dietel

    Tom Dietel February 15th, 2022 @ 08:55 AM

    Hi. I have the same problem, with Mailmate using about 60% CPU and the WindowServer another 80% on a recent MacBook Pro. I also generated the samples file. However, it seems I cannot upload, because the quota has been reached.

  • benny

    benny February 17th, 2022 @ 10:03 PM

    Please try again with the latest test release: Hold down the option key when clicking “Check Now” in the Software Update preferences pane.

    (There's unfortunately almost never enough quota in the ticket system. Use “Help > Send Feedback” to send me files via MailMate.)

  • Oleg

    Oleg March 5th, 2022 @ 04:30 AM

    Hi. I'm still seeing the same issue with the latest build 5875. I sent a fresh sample via email feedback from Mailmate.


  • Tom Dietel

    Tom Dietel March 17th, 2022 @ 07:31 PM


    I still occasionally had this issue with 5852. I have sent you an email with the sample as advised. I also installed the latest test build 5878 to see if the issue is still there.

    Cheers, Tom.

  • benny

    benny March 25th, 2022 @ 01:14 PM

    The theory is that this only happens on Big Sur (for some users). I have no reports on Monterey.

    (I would be interested in knowing if anyone has this issue on Monterey with the latest test release.)

  • benny

    benny April 20th, 2022 @ 01:05 PM

    • State changed from “new” to “closed”

    I'll close this ticket, but I'm still interested if anyone has more details to add about when this might or might not happen.

  • Oleg

    Oleg April 20th, 2022 @ 01:24 PM

    as a data point – I upgraded to Monterey about a week ago, and haven't noticed any CPU abuse since the upgrade

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