Yes, you can connect a MacBook to the Samsung Odyssey OLED G9 - G93SC via USB-C, but there are a few things to keep in mind:

- Make sure you are using the correct USB-C cable that is suitable for video transmission. Not all USB-C cables support video output.
- Connect the monitor to a Thunderbolt / USB 4 port on your MacBook. These ports support the necessary video output.
- If the monitor's cable is not directly compatible with your Mac's ports, you can use an adapter that converts USB-C to the appropriate port.

It is important to check the documentation of the monitor and the Mac to ensure that all ports and cables are used correctly.