Macbook Pro 2008 Gigabit Ethernet has become 100Mbps with Mavericks I just noticed that the Ethernet port on my old Macbook Pro 5,1 (Late 2008, the first Unibody model) that is supposed to be Gigabit is limited to 100Mbps after I installed Mavericks. Does anyone know how to fix it?
It's just a basic install of Mavericks, no strange configurations, I'm using it as a home server.
Try another cable, or another port on the other end of the ethernet cable if available.