Virtualbox version 7 which was just released and on macOS hosts it has dropped all kernel extensions. VirtualBox relies fully on the hypervisor and vmnet frameworks provided by Apple which requires instructions not supported on the Westmere processor.
VMWare Fusion made this move for BigSur and beyond so I have been using Virtualbox in Monterey. Version 6.1 is still being maintained and runs (slower than Fusion on Catalina).
Reference -
VMWare Fusion made this move for BigSur and beyond so I have been using Virtualbox in Monterey. Version 6.1 is still being maintained and runs (slower than Fusion on Catalina).
Reference -
Broadcom Community - VMTN, Mainframe, Symantec, Carbon Black
Broadcom Community - VMTN, Mainframe, Symantec, Carbon Black
communities.vmware.com