Why does my Mac Mini's name keep changing?

Discussion in 'Mac mini' started by itsjustmeee, Nov 8, 2010.

  1. itsjustmeee macrumors 6502a

    Dec 28, 2008
    For some reason, my Mac Mini keeps giving me the "name of your computer "Mac mini" is already in use on this network. The name has been changed to "Mac mini (2)" message lately. It keeps going from there. For example, right now it's up to "Mac mini (5)". Does anyone have any idea as to what would cause this?

    BTW, this just started a few days ago and as far as I know, nothing has changed since then.

  2. Pinkerton macrumors newbie

    Jun 5, 2009
    San Jose, CA
    I've had the same or a similar issue. My computer was constantly renaming itself with a (2) every time it booted, after a system lockup. I tracked the issue down to CD/DVD sharing... when turned off the problem went away.

    When CD/DVD sharing was on, I could not change the name back to the original version, it would get rejected and immediately set back to the version with "(2)", displaying the message:

    The name of your computer "Name" is already in use on this network. The name has been changed to "Name (2)" automatically.

    With CD/DVD sharing turned off, I could name my computer whatever I liked, even back to the original name. Turning DVD/CD sharing back on again would instantly rename my Mac. It's very persistent bug!

    Fortunately I found a fix. I was able to get rid of the problem by toggling Bonjour, as described here:


    To turn Bonjour off:

    sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

    To turn it back on:

    sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

    Toggling Bonjour (mDNSResponder) forced a reset of something on my system somewhere, and now I no longer see the issue on reboot, even with CD/DVD sharing turned on. I can turn sharing on and off at will, and my computer is never renamed. Success!

    I don't think this problem has to do with CD/DVD sharing specifically... I think it's a bug in Bonjour. I've seen threads where people have complained about this issue because of printer sharing, or remote management! My guess is that a crash can cause a mDNSResponder config corruption, tricking Bonjour to share devices or services using the same name as your computer, forcing the name conflict.

    In any case, I hope this fix works for you too. I know I'm a lot happier now that there isn't a lingering issue on my box!

Share This Page