Make a note of your settings for the Ethernet service. If the preference pane is locked, unlock it.

You'll first have to unlock the settings by clicking the padlock icon and entering your administrator password.Ħ. If the Firewall is on, turn it off in the Security & Privacy pane of System Preferences. If Wi-Fi is on and connected to the same network, please turn it off.ĥ. Switch connections with one of the working devices.Ĥ. If other devices are working normally, or if there are no others, the problem may be caused by a faulty cable or port on the hub. If there are other devices on the same network, and none of them can get an address, then the problem is on the DHCP server (most likely, the router.)ģ. You need to change the configuration of the modem so that it shares its Internet connection with all devices on the local network, or else connect a router.Ģ. If the computer is connected through a switch to a cable or DSL modem, and the modem is not acting as a router, then only the first device to connect will get an address.

Mac ethernet self assigned