Thank you for sharing! Yes, macOS has such logic and it works just fine. The main issue from clatd that it's pretty tricky to setup and it emulates presence of IPv4 on machine which is not very desirable as it tends to hide issues with other tools.
My plan was to explicitly disable IPv4 connectivity for machine and hide it from other app but keep it active for subset of well known broken tools and then fix them one by one and switch to IPv6 only setup.
Thank you for sharing! Yes, macOS has such logic and it works just fine. The main issue from clatd that it's pretty tricky to setup and it emulates presence of IPv4 on machine which is not very desirable as it tends to hide issues with other tools.
My plan was to explicitly disable IPv4 connectivity for machine and hide it from other app but keep it active for subset of well known broken tools and then fix them one by one and switch to IPv6 only setup.