You can connect your MacBook Air to the Odyssey G9 with a USB-C cable (Thunderbolt 4) to transfer data and video. The monitor has a USB-C port that is suitable for data and video exchange. However, the Odyssey G9 is not used as a USB-C Power Delivery (PD) source to charge your MacBook Air, as it does not support Power Delivery via USB-C itself. However, you can connect all additional devices to the monitor and use them via the integrated USB hub. However, you will need a separate charging cable to power your MacBook.