dizz818

^Tried this but no luck. 

Any step between reinstalling and running the patch? 

You don't open RS so it recognizes the original DLCs?

Those were the exact steps I took. Which Catalina do you have? Honestly I'm afraid to update these days in the off-chance it'll mess up more than just RS

After those steps, I open RS and it recognizes both original and CDLC

Sept 3, 2020, Catalina-4 (OS 10.15.4), 2017 iMac

Had a bit of a struggle earlier, even with the patch, but I got it to work eventually. Here's what I did.

Uninstalled RS via Steam app

Reinstalled via Steam app

***NO MANUAL DELETING OF STEAM/RS FOLDERS WHATSOEVER***

Moved the patch folder into the Rocksmith2014 folder (Library/Application Support/Steam/steamapps/common/Rocksmith2014/MAC_Patch)

Ran the patch from within this directory

Boom, freezes and crashes gone, CDLC works. I previously ran the patch from the desktop and downloads folders with problems causing RS to not even launch. I think moving the patch folder/files into the RS folder was the magic touch...at least for me.

Good luck!