Tuesday, December 16, 2008

Time Machine requires built in network interface

I'm using an Intel Mac Mini with a dead on-board ethernet port (lightning strike) and it seems I can't use Time Machine for backup.

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"Time Machine could not be configured. The built-in network interface could not be found." - I'm on 10.5.6 by the way (the error was less informative before).

I can set up networking either wirelessly or with a USB ethernet dongle (the one for the Air seems to work these days), but Time Machine won't let me choose a backup volume.

Weird thing is that I can configure the on-board ethernet port, it has a mac address it just permanently looks to be unplugged.

The other interesting thing about this is that Time Machine works on a MacBook Air which only has wireless or USB networking.

Update

Got it working by doing this as root:


mv /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist.old


Rebooted, went to Network System Preferences, tidied up the network interfaces (deleted bluetooth, a serial device, and the Firewire device) and re-configured Time Machine.

Anyway, it's good to back on the Time Machine routine again.

7 comments:

  1. Anonymous7:26 AM

    wow thanks for this tip. saved my TM backups, as opposed to starting over my deleting some files on the TM drive like apple support suggests.

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  2. Thank you so much you are very kind to post it here and help a person like me.

    I just added "sudo " before the mv command, to execute it as a super user.

    Thanks again

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  3. Glad to hear this is helping other people.

    Yes, you need sudo to execute the command as root.

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  4. Anonymous1:37 AM

    Thanks! Worked liked a charm.

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  5. Great! In my case, the sudo command didn't work but I was able to rename the plist file by first placing it in the Trash.

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  6. ok i did this but now my internet does not work at all please tell me how to undo what i did

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  7. Sorry to hear that Tim. I would try going to the Network preference panel and re-adding your interface (either ethernet or wireless).

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