You can print from MAC to your printer using PCL, but only in B&W. If you need full funcionaty you need to purchase the PS module. Any way, you can install it doing this:
Add printer -> IP and chose: LPD on protocol, set the ip address, in the queue field you can write anything. In the print using field chose Generic PCL Driver. and it is done.
But, one more time you will be very limited on settings and it is not supported by Xerox.
I am using xerox workcenter 7120 without the PostScript module. I can only use PCL6 to print (in windows)
I have used the latest osx driver for mac. My problem is that it is using PS by default to print. How can I modify it to use PCL insead?