Hello! i have parallel desktop 7 and a mac with snow leopard.. yup i do not like updated i've a problem, i've bought a keyboard with macro button and i wanna share the keyboard between osx and win7 because i need excel 2013. excel for mac is too slow.. is possible share the usb between those 2 OS? because normally i can only select which OS can use the USB and if i select mac my macro button do not work on windows and also the contrary. i need to have both enabled. thanks