You can turn off the internet and freely use your Mac. The network dependent features are smart enough to know you are offline and not impede you. Their proble

You can turn off the internet and freely use your Mac. The network dependent features are smart enough to know you are offline and not impede you. Their problems come when you have bad connections or Apples servers are down/overwhelmed. They don’t fail gracefully then. As a mobile developer I know there are always at least two or more failure modes with any network request, failures because of network/server failures, or failures because internet is off. My clients constantly think Airplane mode is the bad network test case,and I constantly remind them that no, it’s only one possible error cause.