Set Jumbo Frames (macOS) - CESNET/UltraGrid GitHub Wiki

To work with uncompressed video, you need the Jumbo frames enabled:

1. From the Apple menu, choose System Preferences.
2. Click Network.
3. In the left sidebar, select "Built-in Ethernet 1".
4. If you see a lock icon in the bottom left corner, click the lock icon and enter your administrator password.
5. Click the "Advanced..." button.
6. Click the Ethernet tab.
7. From the Configure: pop-up menu, choose "Manually".
8. From the MTU pop-up menu, choose "Custom".
9. Enter your desired setting (9000).
10. Click OK, then click Apply to save your changes.