Unable to add MAC address to AirPort Base Station access list.

[Unspeaked]

I'm trying to add a new MAC address to the access list of a AirPort Extreme Base Station.

For whatever reason, it won't accept it. When I finish entering the address, the add button is grayed out. If I try other valid addresses, it works fine. For some reason, something about this address won't allow me to add it.

Any ideas or suggestions?

 

[ScoobyMcDoo]

post the MAC if you feel comfortable doing so. You could also use wireshark to grab the mac just to make sure you have the right one.