You can download RunCat 8.3.1 for Mac from our application library for free. The actual developer of this free software for Mac is Takuto Nakamura. The application lies within System Tools, more precisely System Optimization.
From the developer:
RunCat provides a key-frame animation to the menu bar.
Animation changes the speed depending on the CPU consumption of Mac.
The cat runs at the speed according to the CPU usage of your Mac.
By looking at the running of a cat, you can see how much CPU load is.
You can purchase various Runners at the Runners Store.
It is also possible to always display the system information on the menu bar.
You may want to check out more software for Mac, such as Air Mic, Dock Delight or Panther Cache Cleaner, which might be related to RunCat.