Over-inflated Tires. Tire tread wear in the center of the tread pattern tells you that the inflation patterns are too high. Too much pressure can cause the contact patch to shrink and the center of the tire to carry the entire load. Under-inflated Tires.
Apple Products and Services. Most Thunderbolt hubs won't work. In fact, I'm not sure if any will work not. (I've never been in a position to try this with a MacBook Air.) I found several instances from people who thought it would, bought a Thunderbolt hub, then found out it wouldn't work. The best way to do it, is to plug one monitor into the Thunderbolt port and another one into a USB port. To do this you will need the appropriate adapters. What adapters you need depends on what kind of monitors you are hooking up, and what ports they have. According to Apple, you can hook up a total of two external monitors to a MacBook Pro. Written Sep 25, 2015.
Set up an external monitor. To set up an external monitor with your laptop, connect the monitor to your laptop. If your system doesn't recognize it immediately, or you would like to adjust the settings: Click the icon at the very right of the menu bar and select System Settings. Open Displays.