You could have downloaded Realm Status 1.0 for Mac from our software library for free. The software is included in System Tools. This free software for Mac OS X is a product of Tim Parnell.
From the developer:
Realm Status is a small menubar item to quickly determine the online status of your World of Warcraft server. Quick, easy, small. Not bloated like the others, this tiny app is only for one server.
US World of Warcraft Only.
You may want to check out more software for Mac, such as Nightmare Realm: In the End., Haunted Past-Realm Of Ghost CE or Nightmare Realm, which might be similar to Realm Status.