Apologies if this is a double post, but Xerox have a couple of patches for Snow Leopard that may be relevant to some people:
If the provided links do not work, the original links can be found on the Xerox Support site at http://www.support.xerox.com, under Support & Drivers, then Drivers & Downloads. Select Mac OS X as your operating system from the drop down list.
Mac OS X Update for 10.6 (for Fiery / EFI print servers only, located in Drivers section)
LINK
This utility application modifies the “permissions” on the Fiery CUPS filter file and folder so that users can print on Mac OS X 10.6 (Snow Leopard) with Fiery Driver 2.9 and 3.0.
Mac OS X 10.6.8 Patch (located under Patches, possibly not available on all printer pages, this link was off the Xerox Digital Colour Press 700 page)
While we are waiting for an official patch to be released from Apple to address the CUPS printing issue, we have made this temporary fix available on the Drivers & Downloads pages. This is not a permanent solution and is not intended for 10.7 / Lion, but will correct the problem for our products in 10.6.8. If you have problems installing this fix, or otherwise, please contact the Support Center.
For anyone else using EFI / Fiery printing, they have released an Express Driver for Lion / 10.7 while the full driver is in development. I have it on good information that the full driver is not far away but if you have Lion and need to print to a Fiery driven printer, you will need this driver:
Download location: Support (Requires registration + login, I receive little to no spam mail, if any) -> EFI Software -> Fiery Express Driver for Mac OS X 10.7
PDF guide is also located here
Hope that helps,
Luke