Downloading GoodKitty 1.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The software lies within Audio & Video Tools, more precisely Streaming Media. The actual developer of this free Mac application is Coorpe.
From the developer:
GoodKitty is an application that simplifies your listening experience by allowing you to listen to http://live.monstercat.com without having to load the page in a browser. This way, you no longer need to hunt through multiple browsers, windows, or tabs to start or stop your favorite stream.
You may want to check out more software for Mac, such as Oplayera, Machinima Respawn or Jenny FM, which might be similar to GoodKitty.