id summary reporter owner description type status component version resolution keywords cc guest host 20781 starting guest with --type headless fails on macOS Mojave host rlhamil "{{{ sh-3.2$ VBoxManage startvm bigapple-solaris10 --type headless Waiting for VM ""bigapple-solaris10"" to power on... VBoxManage: error: The VM session was aborted VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component SessionMachine, interface ISession }}} failed! But {{{ sh-3.2$ VBoxManage startvm bigapple-solaris10 --type gui Waiting for VM ""bigapple-solaris10"" to power on... VM ""bigapple-solaris10"" has been successfully started. }}} succeeded. I've seen headless work on the same host with a Solaris 11 guest, but I'm not saying headless is ever reliable on there. This was present in at least VirtualBox 6.1.30 and 6.1.32. It seems to be ok with a macOS Catalina host. " defect new other VirtualBox 6.1.32 rlhamil@… other other