@Seth However it seems debated, someone here claims having solved it in OSX: hackintoshosx.com/topic/… Probably the truth is in the middle, poor VirtualBox support and a hard to please OSX
user136984
@kos: Why would it be a hardware issue if right now I can type in caps, but if I open a system text box (such as the search in the Activities Overview) it won't allow the caps lock key?