Hello,
I am running Ubuntu on a Macbook Pro and macOS High Sierra as a guest in VB 6.1. It was all good until I upgraded to 19.10, and now I'm getting constant application crashes (e.g. Safari on startup), logouts and VM restarts, to the point the VM isn't capable of staying up more than a few minutes. I thought maybe there was something wrong with my hardware, but I just installed Linux Mint 19.3 (based on Ubuntu 18.04) and VB and its macOS guest are fully stable there.
Is this a problem that's known? I'll be glad to help debug it if necessary. I'll be upgrading to Ubuntu 20.04 after it comes out and I'm hoping I can use my macOS installation again without rebooting to Mint.
Thank you.