[Hernanpm]

I noticed no one mentioned https://www.tripmode.ch/ I used to use Little Snitch before but it was to complex for what I wanted to do, allow disallow internet access to certain apps, tripmode does the trick in the simplest way I've even seen.

[kilroy123]

Trip mode is nice, but it's pretty darn buggy, and hangs a lot. I also never see any updates to it. Which is frustrating as a paid user.

[salzig]

»TripMode activates itself on networks where you used it before.«

Wow, that's amazing. Apple should buy them and make this feature default :-)

[DavideNL]

Little Snitch can do this also, called "Automatic Profile Switching".

[chmars]

TripMode doesn't catch all traffic, for example traffic from Arq backups.