Connecting Mac to display

First off, your Mac only supports up to 4K. To connect, you’d need a mini-DisplayPort to XX adapter, depending on the displays input(s) – DisplayPort, HDMI, etc. If the display has only USB-C, you need the Apple Thunderbolt 3 to -2 adapter and a USB-C cable.

Apologies – yes, the adapter connects to the display and you’d need a TB2 cable from MB Air to adapter.