pkg install virtualbox-ose

• Requires src for kmod
• https://wiki.freebsd.org/VirtualBox
• https://docs.freebsd.org/en/books/handbook/virtualization/#virtualization-host-virtualbox
• https://docs.freebsd.org/en/books/handbook/virtualization/#virtualization-virtualbox-usb-support
• Reboot after doing everything

su -l

ee '/boot/loader.conf'

vboxdrv_load="YES"

ee '/etc/rc.conf'

vboxnet_enable="YES"
devfs_system_ruleset="system"

pw groupmod vboxusers -m 'espionage724'

ee '/etc/devfs.conf'

# VirtualBox

own vboxnetctl root:vboxusers
perm vboxnetctl 0660

[system=10]
add path 'usb/*' mode 0660 group operator

perm cd* 0660
perm xpt0 0660
perm pass* 0660

# End

Running VirtualBox as non-root user may fail with a fatal error
NS_ERROR_FACTORY_NOT_REGISTERED. In this case delete /tmp/.vbox-*-ipc file.

If you experience "Network: write Failed: Cannot allocate memory" errors
try to increase net.graph.maxdata in /boot/loader.conf

vm.max_user_wired
https://bugs.freebsd.org/252227

("RAM in GB" - max(1, "RAM in GB" / 32)) * 1024*1024*1024 / PAGE_SIZE
PAGE_SIZE on x86 is 4096.

https://bugs.freebsd.org/259399