hi,
i have virtualbox 4.2.4r81684 and the estension 4.2.4-81684 but in all my virtual so already insert (ubuntu, xp, win7 or win 8 64bit) osx... when I try to search any usb device, I go into the menu, I select devices, USB devices and do not find anything, there is only gray in the word no usb device connected .. when in fact there are several in the pc usb devices ... before installing mac os everything worked ... But I do not see how the installation of a virtual machine to mess up all the other ...
i have already installed the estension.. and now I'm taking care to re-install the latest version of virtualbox ... (which is the same one that I have already too)
some info?
thanks.
usb not available
Re: usb not available
i have found a solution.. i must reinstall virtualbox.. 
thanks all.
thanks all.