I am using VirtualBox 4.3.2. I have recently upgraded to OSX Mavericks and after I close VirtualBox it doesn’t seem to close properly and it’s still running. Doing force quit doesn’t seem to close VirtualBox.
The worse part is that I can’t seem to be able to shutdown my laptop! When try to shutdown after having run VirtualBox the shutdown process gets stuck and the only way to shutdown properly is by pressing the “Power On/Off” button on the laptop for some time.
The solution that works for me, is to go to the “Login Window” screen (by clicking on my account name on the top right corner, next to the clock -> Login Window…”. Then I click on “Shutdown” from that screen and it works.