Connect MacBook Pro to Smart TV wirelessly

If you have Google Chrome installed, open it.
Then click the three lines in the top right corner then Cast -> Sources -> Desktop -> [chromecast name] TV

Make sure Google Chrome has screen recording permissions in System Preferences -> Security & Privacy -> Privacy

I don't know if this is what you were mentioning in your first post, but this is what works best for me. I think in your post you were mentioning casting just the tab you are looking at, whereas my method casts the entire display.

I want to transmit the screen of my MacBook to these TVs so I can work in different apps, documents, code and watch movies.

You need a simple AirPlay compatible dongle plugged into the HDMI port of your TV.

I have used several of these in different locations

• The work great for business presentations (i.e. PowerPoint) and simple animations
• They work fairly well for playing standard definition video (i.e. YouTube or regular DVD).
• It's marginal at best once you get to HD video (720p or 1080p)
• If you want 4K, UHD, HDR, etc, you need an AppleTV.
• It doesn't get around any copy protected (DRM) content; it won't play!

For their price point of sub $50 USD, they're a great little adapters to keep in your computer bag for when you go on client site for a presentation, training, or you just want to mirror to a larger screen. It's also good to attach to a projector so guests can easily connect. They're convenient, but not meant for high performance so keep that in mind when putting together your solution.