CPU usage always between 25-50%

dan's Avatar


15 Jan, 2018 11:37 PM

While sitting idle Airmail typically uses about 30% of my CPU but often spikes higher. I don't think it is still downloading/processing messages at I've been using it for weeks. Someone from Airmail suggested disabling the Idle option in the More menu of each account but that doesn't seem to have changed anything.

I am running Version 3.5.3 (468) on 10.13.2.

  1. 1 Posted by kernytsky on 19 Mar, 2018 03:08 PM

    kernytsky's Avatar

    I'm also having this problem. I'm using Airmail 3.5.4 on a late 2015 MacBook Pro. The only thing that I've done is cleared the message cache recently and I think this is when this started happening. It uses so much energy I need to quit it and use Mac Mail when on battery so that it doesn't drain it too quickly.

  2. 2 Posted by JP on 12 Apr, 2018 03:43 AM

    JP's Avatar

    I've got the same problem as kernytsky. Version 3.5.4 (467) on a 2017 MacBook Pro.

  3. 3 Posted by BT on 13 Jun, 2018 09:46 PM

    BT's Avatar

    Me too, also on a 2017 MBP, version 3.5.5 (474). Airmail uses lots of CPU resources constantly, causing the laptop to heat up.

  4. 4 Posted by Masen Davis on 15 Aug, 2018 07:37 PM

    Masen Davis's Avatar

    I'm having the same problem with a 2015 MacBook pro - Airmail is currently showing 129% of my CPU. Is there a fix?

  5. 5 Posted by Manny San on 27 Aug, 2018 07:24 AM

    Manny San's Avatar

    Using Airmail 3.5.4 (467) on Macbook Pro 13" mid 2010 with MacOS Sierra 10.12.6.

    Airmail is draining battery and heating up laptop with a constant usage of % CPU over 100%. Right now with 146.4%.

    It has been happening over the last 3-4 months every single time I start up Airmail.
    I haven't been able to find any fix anywhere apart from the comments on this thread.
    If I do not find a fix I will have to stop using Airmail immediately.

  6. Support Staff 6 Posted by Airmail on 27 Aug, 2018 01:48 PM

    Airmail's Avatar

    during the initial fetch is normal to have cpu spike
    once AM downloaded the main email index should be ok

  7. 7 Posted by TW on 02 Sep, 2018 08:54 PM

    TW's Avatar

    I am also having this problem. Airmail 3.5.9 on Macbook air early 2015. The Support Staff response here is not helpful as we are all saying that the laptop heats up even after the initial fetch. It is constant. Mine is right now at 201% and Airmail is idle.

  8. 8 Posted by arne on 05 Sep, 2018 12:44 PM

    arne's Avatar

    my cpu is easy at the startup, but once all activity is done (idle) it puts 200-300% on my cpu making the fan go crazy and the macbook burning hot. only way is to kill airmail. running 3.5.5

  9. 9 Posted by turnertomes on 05 Sep, 2018 12:53 PM

    turnertomes's Avatar

    I am running App Tamer to monitor CPU usage for various apps. My Airmail 3 (current update) on my 2017 5K Retina iMac is using only .01 % of my CPU at rest and about 30% when downloading mail then drop down to .03 to .01% of my CPU. RAM usage I regard as a bit high currently at 463 MEGS at rest.

  10. Support Staff 10 Posted by Airmail on 07 Sep, 2018 10:55 AM

    Airmail's Avatar

    I did some fixes
    that will be in the next beta

  11. Airmail closed this discussion on 07 Sep, 2018 10:55 AM.

  12. dan re-opened this discussion on 08 Sep, 2018 03:20 AM

  13. 11 Posted by dan on 08 Sep, 2018 03:20 AM

    dan's Avatar

    I have just upgraded to version 3.5.6 (513). If anything, the CPU issue has gotten worse. Airmail has been using 100% of a cpu and my fan has been on all afternoon/evening.

  14. 12 Posted by Merlot Allred on 11 Sep, 2018 02:09 AM

    Merlot Allred's Avatar

    I was doing some Activity Monitor stuff on another program. Just noticed that Airmail is using more than 4GB of RAM. Seriously?

  15. 13 Posted by Dan on 11 Sep, 2018 08:20 AM

    Dan's Avatar

    Same problem for me - just started yesterday. Tried updating to Version 3.6.1 (506) but that hasn't helped. Airmail starts off at reasonable CPU level but then builds and builds, eventually becoming unresponsive.
    Using an old macbook (2010) running Sierra (10.12.6).

  16. 14 Posted by Marcus Gallaghe... on 16 Sep, 2018 02:56 AM

    Marcus Gallagher's Avatar

    Having the same problem too. I've tried to run Airmail in Safe mode to isolate the problem. I think it might have something to do with Outlook/Exchange servers.

  17. 15 Posted by Hugo on 17 Oct, 2019 07:48 AM

    Hugo's Avatar

    The only solution is install another email client. I uninstalled Airmail an installed Spark. 100% fix the problem.

Reply to this discussion

Internal reply

Formatting help / Preview (switch to plain text) No formatting (switch to Markdown)

Attaching KB article:


Attached Files

You can attach files up to 10MB

If you don't have an account yet, we need to confirm you're human and not a machine trying to post spam.

Keyboard shortcuts


? Show this help
ESC Blurs the current field

Comment Form

r Focus the comment reply box
^ + ↩ Submit the comment

You can use Command ⌘ instead of Control ^ on Mac

Recent Discussions

29 Jul, 2021 08:52 AM
28 Jul, 2021 08:45 AM
28 Jul, 2021 06:08 AM
29 Jun, 2021 10:59 AM
29 Jun, 2021 10:32 AM