Here’s a little secret that makes you look like a pro: You can choose how your screen appears on the TV. When you connect, go to System Settings > Displays. You’ll see two options.
Mirroring shows exactly what’s on your MacBook on the TV. Perfect for showing photos or a presentation. Extending turns your TV into a second desktop. You can drag a movie over to the TV while you keep your email or a game on your laptop. Multitasking royalty. Try it—it feels illegal but it’s not.
How To Mirror Macbook To Tv With HDMI | Robots.net
