Our friends in Miami and France have come together to provide the Apple II Quark Catalyst scans and disk images. When asked about the project to bring this back out of the realm of the lost software, Javier Rivera said,
“This is one package that many users had for their Apple II’s, but no one seemed to have it at this point. When we finally found a copy of it, we made sure to get it into digital format as soon as humanly possible.”
You can download the Manual in PDF format from the Apple Archives website at:
https://www.callapple.org/soft/ap2/quark/Quark_Catalyst_3.0.pdf
The disk image is also available at:
https://www.callapple.org/soft/ap2/quark/Catalyst3.0.po