Powermetrics is a command that shows very specific information about what’s using your systems power. This makes it handy for troubleshooting what processes are taking up CPU, GPU, etc. To run a basic iteration of the command, we’re going to look at a usage summary report, using the –show-usage-summary option: powermetrics -a --show-usage-summary The output is as follows: Machine model: MacBookAir6,2 OS version: 13A598 *** Sampled system activity (Sun Dec 1 23:04:13 2013 -0600) (5006.04ms elapsed) *** *** Running tasks *** Name PID CPU ms/s User% Deadlines (