https://help.netflix.com/en/node/55764 😳😳😳
Netflix is available in HDR on Apple computers using the Safari browser.
To stream HDR content on your Apple computer, your system must meet or exceed the following requirements:
macOS Catalina 10.15.4 or later
A compatible Mac model with an HDR-capable display
If using a cable or adapter, it must support HDR
The High Dynamic Range checkbox is selected in System Preferences > Display
If you don't know if your computer meets these requirements, contact the manufacturer.