I should probably start a thread on this at this point, but I’ve leveraged pyrocksmith with the Mac OS Automator app to build a drag-and-drop applet that converts whatever CDLC you drop on it from PC to Mac and vice-versa. You still have to put your Mac file into your DLC folder yourself, but it makes converting an entire folder of CDLC from one platform to the other easier than converting a single *p.psarc file on the command line. It’s still not as good as having a version of the Rocksmith Tool Kit that works under Catalina, but it does the job.