Does anybody know how I can stop my Mac displaying an utterly unhelpful message every time it wakes up from sleep: "This computer’s local hostname "INSERT NAME HERE" is already in use on this network." I've done multiple Google searches, tried every fix under the sun (changing my computer's name via System Prefs AND via Terminal, disabling wifi and only using wired connection, etc.), but the error still pops up every time I resume my machine.... It's only been happening for a few weeks, possibly since just after I got a NAS drive if that's any connection....?? Anybody know why this happens or how to stop it???