I have a related question that is slightly more complex:
I need to open / view the package contents of an installer dmg so that I can copy the necessary files to a system HD of a mac pro running Lion (10.7.5), that I have mounted on my mac mini desktop, which is running Mavericks (10.9.5).
This is because I think the Video card on the mac pro has died and I want to verify this.
I have a DisplayLink USB video adaptor that allows me to connect a screen via USB.
I have used it in the past and it works fine - no need to even have a video card, although it uses up a bit more CPU.
However, the Lion system disk for the Mac pro will need the DisplayLink driver installed before the USB to video out will work.
Any work arounds would be very much appreciated.