Since ioquake3 wiki is down there are not instruction to compile launcher (ioquake3fe-1.36.app) for the new macOS Catalina 64-bits version.
Anyone who can give me the instructions please?
ioquake3fe is a front-end that you do not need to play ioquake3. It is a helper application that is not required. I don’t believe there are instructions on the wiki for building the “front end.” Which is not the same thing as the “launch” launcher on GitHub. It is difficult to use ioquake3 command-line options on macOS and that’s why the front-end exists, but it isn’t necessary.