For any other Mac users who have the “Can’t run app” error. I found a fix. (It may not work on all Macs)
- Open Finder.
- Go to the .app
- Right click -> Show Package Contents -> Contents
- Open Terminal.
- Type “chmod 755 “ (with ending space)
- Drag the MacOS folder from Finder onto Terminal.
- Add “/What\ Lives\ Below\ Demo” to the command (See Command below)
- Press enter
- Right click on the application (the .app)
- Press Open
- Press Open (Because it may ask you about unidentified developers)
(Command) The Terminal command should be something like: “chmod 755 /Applications/What-Lives-Below-Demo-Mac.app/Contents/MacOS”
Tested on Mac OS Catalina
This has been said before, but just clarifying it