I need to send a keyboard key combination to 5 computers simultaneously triggered from a simple push button. Would this be possible using the spare interfacekit 8/8/8 6 port USB hub Phidget that we have.

I am trying to install Phidgets22 onto a Mac mini running 10.6.7. I have downloaded the installer for older OS. When I double click the Phidgets.PKG I get the following error.

This operation couldn't be completed
(Com.apple.installer.pagecontroller error -1)
Couldn't open Phidgets.PKG