Unity Hub 2.4.0 on Mac OS 10.15.6 Catalina fails to install Unity & save Unity Editor Folder path. Installs fail silently. Uninstalls work fine. You can set the Unity Editor Path to "/Applications/Unity/Hub/Editor" manually but you can't save it. I suspect this has something to do with the validation added in 2.4.0. Maybe related to issue 1161643 as well, idk. Only workaround seems to be to just install manually and then locate?