CopperLan

hello

I can't choose ethernet adapter on my M2 Mac Studio ... it works on my iMac M1 and my M2 MacBook Pro

any ideas what this could be?

here are a few things you can try:

Make sure the Ethernet cable is securely connected to the Ethernet port on your Mac Studio and the router or switch.
Restart your Mac Studio and your router or switch.
Check your network settings to make sure they are correct.
If you are using a USB-C to Ethernet adapter, make sure it is compatible with your Mac Studio.
If you are still having trouble, contact Apple Support for help.