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Slack is preventing my Mac from sleeping. I can see this information in the Activity Monitor.
How can I disable it? I want my mac to sleep even when Slack is open.

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  • Update 2021: same issue, the only way to allow my mac to go to sleep while plugged-in is to quit the Slack app... :(
    – MrYoshiji
    Sep 3, 2021 at 12:59
  • At some point after restarting my machine, slack stopped preventing my mac from sleeping. I have no idea what was changed. Sep 5, 2021 at 9:31
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    I think it keeps it awake after you do a Huddle. I had to restart the app after a hudd to go back to not keeping it awake.
    – chamini2
    Oct 12, 2022 at 14:24
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    Slack has recently been made aware of this issue.
    – Noel Yap
    Nov 14, 2022 at 19:40
  • @NoelYap is there a ticket or something like that? Dec 8, 2023 at 20:43

1 Answer 1

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It's the "Slack Helper" service preventing your mac from sleeping.

If you open the Activity Monitor and terminate the service, it will go to sleep.

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    It might apply only when you use an HDMI monitor as your sound output: that is what I see by experimenting with switching to built in speakers.
    – nmgeek
    Dec 24, 2022 at 19:48
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    For me just terminating Slack did the trick: Slack then no longer prevented sleep. It might be related to having used the huddle feature. There was also continuous use of around 6% CPU by the coreaudiod, which also was stopped by restarting Slack.
    – Georg
    Jan 24 at 5:43

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