Comment by jezek2

MacOS can run unsigned apps with GateKeeper active, no need to disable it. Attempt to run the app, then go into security settings, scroll down and click on "Open anyway". And before Sequoia a right click -> Open was sufficient.

On M1+ devices it might also need "ad-hoc signing" if the developer hasn't done it (not required for Intel binaries). This is not a true signing, it just inserts a cryptographic checksum into the binary, no actual signing is involved.