Thanks for the replies. Connecting my TV via ethernet is not possible (it's in another room on the other side of the house). If my understanding is correct, I need the following:
1. Something to plug into my modem (via ethernet?) that will generate a WiFi signal.
2. Something similar to Apple TV (I'm considering Roku after reading reviews at Consumer Reports) that connects to my TV via HDMI.
Am I correct?
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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