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  • macOS Catalina 10.15.6 Bug with Virtualization

    Posted on Nathan Parker Comment on the AskWoody Lounge

    Home Forums AskWoody support Non-Windows operating systems macOS macOS Catalina 10.15.6 Bug with Virtualization

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      • #2285476 Reply
        Nathan Parker
        AskWoody_MVP

        Source: https://www.macrumors.com/2020/07/27/vmware-confirms-macos-virtualization-bug-causes-crashes/

        Before updating to macOS Catalina 10.15.6, if you run virtualization, think twice before doing it.

        A regression in the App Sandbox component of macOS 10.15.6 is reportedly leaking kernel memory, causing macOS to crash. The purpose of an App Sandbox is to provide protection to system resources and limit an app’s access to resources, such as memory.

        Another Catalina bug introduced in an update.

        Nathan Parker

        1 user thanked author for this post.
      • #2285487 Reply
        OscarCP
        AskWoody Plus

        From what I have been hearing for quite a while now about it, I would like to skip Catalina completely, but won’t be able to skip Big Sur as well, because I am still running Mojave. So, before I make a move, I would need to understand this: although it is still early days, does it look at least possible to jump from Mojave to Big Sur, or might be necessary, or at least advisable, to step into it from Catalina?

        Windows 7 Professional, SP1, x64 Group W (ex B) & macOS + Linux (Mint)

        1 user thanked author for this post.
      • #2285500 Reply
        Nathan Parker
        AskWoody_MVP

        You would be able to go from Mojave to Big Sur (Apple doesn’t punish you for skipping an upgrade, unlike some versions of Windows from the past).

        Before Big Sur is released, it should be safe to go ahead and go Catalina to try some of your apps and ensure nothing major breaks (check to ensure your apps are 64 Bit, etc), then gradually move over to Big Sur once any bugs are ironed out.

        Nathan Parker

        1 user thanked author for this post.
      • #2285550 Reply
        anonymous
        Guest

        This bug appears to impact VMware Fusion and VirtualBox, but surprisingly, not Parallels. https://forums.macrumors.com/threads/vmware-engineer-confirms-macos-catalina-10-15-6-bug-causes-crashes-with-virtualization.2247570/post-28714969

        I’ve had this issue on VirtualBox a couple of times when VirtualBox is left running for several hours. The entire Mac freezes and the only way out is to do a hard reboot. Considering switching to Parallels due to numerous other issues I’ve been having with VirtualBox on this machine.

        2 users thanked author for this post.
        • #2285555 Reply
          PKCano
          Da Boss

          I am running Win7/8.1 and Win10 in Parallels VMs on MacOS Catalina 10.15.6 ranging from Ivy Bridge (2012) to Kaby Lake (2017) Macs. I haven’t experienced any problems except with the latest Dev Channel Insider which won’t update from Build 20161 to the current Build. I don’t think that is a Mac problem.

          I have noticed, however, what seems to be a memory leak in 10.15.6 (and maybe in 10.15.5 before as well). Without any VMs open, in the Mac OS, I run Firefox 79 with a minimum of 10 tabs open all day. I have noticed a slowdown in response in the browser as the up time increases. I was blaming it on FF, but maybe MacOS is the culprit. Neither the browser or the computer has ever crashed, but a reboot helps.

          2 users thanked author for this post.
      • #2285584 Reply
        Alex5723
        AskWoody Plus

        I run Firefox 79 with a minimum of 10 tabs open all day. I have noticed a slowdown in response in the browser as the up time increases. I was blaming it on FF, but maybe MacOS is the culprit. Neither the browser or the computer has ever crashed, but a reboot helps.

        What happens if you run 10 tabs in Safari ? If there is no slowdown then it is FF the culprit.

      • #2285587 Reply
        PKCano
        Da Boss

        I don’t use Safari.

        1 user thanked author for this post.
      • #2285649 Reply
        Nathan Parker
        AskWoody_MVP

        Parallels does seem to have the best performance of VM tools on Macs. I’m only using VirtualBox on my old iMac since the VMs I’m running in it are free or old OS’s, and I don’t see me spending money to run those on my Mac. If I were running a recent version of Windows on my Mac, I’d definitely use Parallels over VirtualBox.

        The good news is on my High Sierra iMac is I can run a VM in VirtualBox 24/7 and not have the machine crash. Performance is slow while it’s running since it’s a mini server, but at least it works. Glad I’m running them on the High Sierra iMac instead of the Catalina iMac (Pro).

        Nathan Parker

        1 user thanked author for this post.
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