For some reason my internet sharing has decided to stop working. It was perfectly fine about a day ago, no issues, no hiccups, but today it differs. It won't work at all.
I'm connecting my MacBook Pro Early 2011 model (Running 10.8.2) to a Windows computer via ethernet (I'm still waiting for the wireless card to come). It was working without an issue until I unplugged my MacBook Pro while Internet Sharing was on. Now when I connect it again (while IS is on) it will show connectivity on the Mac, but no internet on Windows. Here is what I see when the cable is connected (to both machines) and Internet Sharing is on:
… and the following:
As you can see the option "Share Your Connection From" is for some strange reason blank, and yes, I have tried countless times to turn it off, click Wifi, and turn it back on. When done so the "WiFi" will only display on the dropdown-list until I close the Internet Sharing option.
I have also noticed that even when I don't have Internet Sharing on, my MacBook Pro still connects to the ethernet and actually states: "Ethernet is currently active and has the IP address 169.254.16.1."
I would appreciate any help, thank you in advance.
Best Answer
I don't have a definitive answer, but I've got some ideas to start, and perhaps we can narrow it down as you try some things and provide more information.
/Library/Preferences/SystemConfiguration/com.apple.nat.plist
(you may want to make a backup copy just in case). Then try re-enabling Internet Sharing (which should regenerate that plist file). It's possible something got corrupted in the configuration file.