If VirtualBox stuck on Saving state, your machine is in the hung state. Kill the VM via the Command Prompt, disable Core ...

The only thing I can really add here is to make sure you know your partition scheme... including what (if different than your normal "/" partition) partition your /boot directory with your kernel is ...

We have observed that when attempting to run a VirtualBox image in Oracle VirtualBox, an error appears stating that VirtualBox is not signed with a build certificate ...

An issue with the App Sandbox is causing problems for some virtual machine software users, with the issue inducing a kernel panic in macOS Catalina 10.15.6 when used for a long period of time. Owners ...