Computer name changing constantly Yosemite

Computer name changing constantly Yosemite

If you have ever wondered why Computer name changing constantly Yosemite i give you some short explantation to prevent MacOS X doing this.

The behavior is controlled by new discoveryd which replaces mDNSResponder on Yosemite and i found out that there is a switch called no-namechange which isn’t even documented on the internal man page of the discoveryd command.
To control strings for discoveryd i use the internal MacOS X command called PlistBuddy to enable this feature.

So what we will need to get this switch enabled is, entering following command in your Terminal app:

sudo /usr/libexec/PlistBuddy -c "Add :ProgramArguments: string --no-namechange" /System/Library/LaunchDaemons/com.apple.discoveryd.plist

And restart your Mac or run following command:
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist

If you want to undo this for whatever reason just enter:

sudo /usr/libexec/PlistBuddy -c Revert /System/Library/LaunchDaemons/com.apple.discoveryd.plist

And it will revert the previous change to the previous modified plist file.

Cheers!

If you having trouble with waking up Mac on Yosemite every 2 hours, here is a temporary fix for that: Fix yosemite rtc alarm wakeup issue