If the upgrade doesn't fit in your budget, perhaps we can consider a discount, or alternate arrangement? Please email me (firstname.lastname@example.org) if you are interested.
Due to the amount of work required, it is not practical for us to go back and rebuild all previous Prince versions to work with the latest MacOS X. We have already done this with Prince 9, and it includes many other new features, bug fixes, and performance improvements as well.
I'm also having problems with Prince on OSX Mavericks. I have version 9 rev 3. Had been working perfectly, but when I upgraded to Mavericks I now experience "Broken Pipe" and "segmentation violation" errors. My prince.log file is empty after I get these errors, but here's the output from my script. When I try running the prince commands manually at the command line I get the same errors.