CS6 Illustrator on Mac OSX 10.15 Catalina - anyone managed to run it?
I was able to get Photoshop CS6 to work with the following. Might work for Illustrator.

package contents > contents > MacOS and launch the executable

(to find the package contents, find the file "Adobe Photoshop CS6.app" in the Apps folder, right-click and select "Show Package Content")