ProjectLibre 1.9.8 runs on Linux, Windows and macOS. However, on macOS it is only on Apple Silicon. It does not run on macOS using x86 chips. There is a workaround if needed but the easiest is to go to Sourceforge.net and ProjectLibre download files and download the 1.9.3 version. That will run on the x86 macOS.
You will need to go to Security/Preferences and “allow” installation since it is not coming from the Apple site. We do have a further workaround if for some reason you are having an issue on Mac and it ‘is’ on an M chip.