Are you still using the Mac version of Gibbs? If so, coming across a working Mac Post for this particular machine is going to be next to impossible. All of Gibb's MTM are custom built using only the Window's format. This is because most MTM's are different and unique to each, and the Mac version is now obsolete. Your best bet is to go ahead and upgrade your Gibb's and have your Post Header custom built. This is going to be a major investment, however, you'll get the most out of your machine and less time programming. The Return Of Investment can be seen within a year if used properly.