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EDIT: Updating to Catalina 10.15.6 seems to have resolved the issue, at least so far. Only had it installed for one evening so I'm not 100% ready to say the issues are resolved


I have a Macbook Pro 16 inch with Catalina installed. It's recently started exhibiting the following behaviour when I try to put it to sleep:

  • When running on battery or standalone AC it sleeps as normal when the lid is closed or when I select sleep from the menu
  • When connected to an OWC dock it sleeps only if the lid is open when I select sleep from the menu
  • When I'm connected to the dock with the lid closed the computer shuts down instead of going to sleep when I select sleep from the menu
  • If I put the computer to sleep when it's docked and then close the lid, it won't wake up until I open the lid

Has anyone else encountered this? How do you fix it?

2 Answers 2

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The problem seems to have been some kind of issue in OSX 10.15.5. Upgrading to 10.15.6 appears to have resolved the issue.

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Depending on which OWC dock model that you have there could be a firmware update; I see one on this webpage that specifically mentions "sleep"- enter link description here I would also look into their app Dock Ejector. That might help with the issue. Let me know how it goes.

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  • It's an OWC Thunderbolt 3 dock, for which I couldn't find any firmware updates. As for the ejector, I was under the impression that it simply ejected all the media that might be connected via the dock?
    – GordonM
    Jul 2, 2020 at 9:02
  • Maybe there's some weird communication going on between the dock and your MacBook that the app could solve (or is creating if you already have it installed). Might be worth a shot. I've never encountered this issue so I'm just thinking of how I might go about troubleshoonintg it.
    – Cabana0309
    Jul 2, 2020 at 16:09
  • The thing is it worked fine at first with earlier versions of Catalina, I think a Catalina update might have borked it in some way. It also works fine when I've got my work-provided Macbook (running Sierra) hooked up to the dock instead of my personal Macbook.
    – GordonM
    Jul 3, 2020 at 10:54
  • Ah... yeah, it's gotta be Catalina then. Figure it had to be a software issue; I just assumed it might be a firmware issue with the dock itself. Dang... sorry we couldn't find an immediate solution. Hopefully Big Sure addresses the issue in the Fall.
    – Cabana0309
    Jul 3, 2020 at 17:05

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