You could have downloaded System Optimizer X 4.7 for Mac from our application library for free. The software lies within System Tools, more precisely System Optimization.
From the developer:
System Optimizer X is a powerful system maintenance and optimization tool, with a uniquely simple design. System Optimizer X uses built-in system tools, and applies proven system-level tweaks and modifications to improve your system, internet, and disk speed and stability.
You may want to check out more software for Mac, such as Optimism, TinkerTool System or System-i DBcompare Lite, which might be similar to System Optimizer X.
System Optimization
System Optimization