The Windows community reacted to similar behavior by Microsoft by creating several scripts and lists of servers being used to phone home. I guess something similar will be created for macOS although the actual packet filtering will have to be implemented on the router rather than the host.

I want a computer that I can use for music without internet. Only connect for software upgrade. Very simple. And I don't want to use linux or freebsd. Mac used to be for pros, not it is just for hispsters.