If you like knowing what’s going on with your mac then you’ll love iStat Pro.
It is a dashboard widget that gives numerous read outs about your mac such as:
• Temperatures of CPU, GPU, Heat sinks + more
• CPU and memory usage
• Battery Status / Health
• Relevant fan speeds
• Internet connections and speeds
• + much more
Click here to download iStat Pro Version 4.92 for the Mac.
Or here for the Official Website