MacOS Catalina breaks Ghostscript and foomatic-rip by requiring 64-bit clean
the current version of Ghostscript proffered with the foomatic-rip drivers is Ghostscript 8.71, which fails in MacOS 10.15 Catalina because it is not 64-bit capable/ready/clean.
Artifex appears to have removed some older Printer drivers that were built into Ghostscript after version 9.04. That version does appear to be capable of being built as 64-bit.
I have blundered upon what seems to be a GitHub repository of some description. It allows me to inspect the code, but I can not figure out how to download the code to build GhostScript version 9.04 to try it out.