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


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.


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.

  • 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
    Commented 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
    Commented 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
    Commented 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
    Commented Jul 3, 2020 at 17:05

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