[acomjean]

My understanding is that there were some issues with Apple often not allowing its own traffic to be filtered via firewalls on its systems.

See discussion:

https://news.ycombinator.com/item?id=25109724

https://news.ycombinator.com/item?id=37500237

If you want to monitor your own network I’ve heard good things about the pi-hole project

https://pi-hole.net/blog/2017/02/22/what-really-happens-on-y...

[sneak]

That’s long outdated information.

LS can easily block all Apple phone-home. (Some must be unblocked, specifically gs.apple.com, for UpdateBrainService, for OS updates to work.)

I have a few macs that don’t communicate with Apple at all except during system updates.