Sign MacOS binaries properly

[kunaltyagi]

MacOS 10.15 and up, Apple requires software distributions to use their "Notarization Service"

https://developer.apple.com/documentation/xcode/notarizing_macos_software_before_distribution

Thanks for informing us. Sadly, my XCode is not willing to compile so I'm unable to help (I was the person who uploaded the original tarball for 1.10.0).

However, if I'm not mistaken, you can circumvent the issue by using the following workflow: System Preferences > Security & Privacy > General > Allow XYZ app > credential-verification

Originally posted by @kunaltyagi in #3707 (comment)

[kunaltyagi]

We need to get PCL as an organization enrolled in Apple's dev program: https://developer.apple.com/programs/enroll/