If you see black bars when streaming to your TV it is because your computer screen uses a different aspect ratio than your display. Modern displays use a widescreen ratio of 16:9, as does Airtame. But some computer screens today have a screen with a 16:10 aspect ratio, as with Apple™ Products, running one of these resolutions:
- 1920 x 1200
- 1680 x 1050
- 1440 x 900
- 1280 x 800
When Airtame (16:9) shows a 16:10 ratio, it must scale and fit the image without distorting it, resulting in areas of the display that show no content a.k.a "Black bars".
If you would like to stream without seeing black bars you need to change the resolution of your computer screen to one of these 16:9 resolutions:
- 1920 x 1080
- 1280 x 720
Just right click on your desktop and choose "Screen resolution"
Mac doesn't allow for you to choose a resolution with a different aspect ratio without a third party application. Luckily there is a third party application that makes it easy, called SwitchResX. It allows you to choose exactly the resolution you want. When you have installed the application go to the program "Preferences" and enable "Launch at startup"
Thereafter, you can choose one of the two optimal resolutions from the Tray menu.