My usage is watching TV on travel and vacation: on airplanes or in hotels with uncertain wifi. So offline (downloaded) viewing is a must.I don't know about Netflix (we have never subscribed), but there have been iTunes / Apple TV apps for Windows and Apple OS laptops / desktops for a long time, and those apps allow downloading for offline viewing. Same with Fandango at Home (formerly Vudu), although I never checked about downloading for offline viewing -- it's not a need for me. I do not know which subscription services allow downloading of their content for offline viewing, but I can access online any service I have ever subscribed to via my laptop -- YouTube TV, Amazon Prime, Peacock, Paramount+, ESPN+, Disney+.
What I'm thinking of is: Netflix has no desktop app any more. It's web viewing only. It does support UHD, which I didn't realize. But it's online only. There's no offline option for desktop / web use. Max is the same. It looks like Prime has a Mac app. So service dependent.
How to use Netflix on your Mac computer
To use Netflix in your Mac Computer, you need to go to netflix.com, there you will get the follow up steps to either sign in or sign up to a Netflix account.

How to download titles to watch offline
Tap the down arrow icon to download titles on iPhone, iPad, and Android phones and tablets.

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