That means that the complete list of Macs that can stream 4K video on Netflix is as follows, at least for now:
iMac (2020) iMac Pro Mac Pro (2019) Mac mini (2018) MacBook Air (2018 or later) MacBook Pro (2018 or later)
Disappointingly, it won’t be feasible for older iMacs and pre-2018 Mac laptops that could potentially play Netflix 4 K content on their built-in screens or from an external 4 K or 5 K monitor. Why the T2 protection chip is required is not clear: Netflix did not have an immediate reaction to us, and Apple did not respond to a request for comment. Users need to go to their Apple menu (top-left corner of the screen) > Device Settings > Controller / iBridge to verify if their Mac device comes with a T2 chip or not. You will still need to switch to Netflix’s $15.99 a month Subscription plan if you want to view 4K Netflix and have a compatible Laptop after macOS Big Sur rolls out this fall. And according to Netflix’s Help Doc, you can only stream 4 K Netflix content via Safari, not other browsers. However, Mac users are not the only ones with unique criteria for viewing 4K Netflix: on Macos, you need to be on Windows 10, with a 4K-capable monitor and a computer with a reasonably powerful Processor or GPU, using Microsoft Edge or the Netflix software.
