Hi, I'm Nathan.Sorry to hear that you're having trouble with this but I'll do my best to help you.
A macbook would not connect to the tv with usb,
this is a smart tv model, it has a built in roku function that will connect directly to your home wifi network, then you can use the tv remote to access its own built in netflix app.
You could connect your macbook to a hdmi port on the tv, via a special adapter, if you wanted to use the tv as a computer display. Is that what you want to do?
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