Unfortunately, the macOS build does not work :(
Apple could not verify “Kirbytop” is free of malware that may harm your Mac or compromise your privacy.
Hi hi, fellow Mac user here – you can find how to get around it here: https://support.apple.com/en-ca/guide/mac-help/mh40616/mac. It's not an issue with the software, it's just a Mac thing; the software doesn't necessarily have malware it just hasn't been vetted by apple personally (costs a pretty penny to do that). Hope this helps!