Hello everyone, I'm having extremely high CPU usage and it's being caused by kernel_task. When looking around on the internet for the problem most people note that their fans are going crazy and most answers to the problem seem related to the fans/heat of the mac book. Dec 31, 2019 · Check CPU Usage on Mac with Activity Monitor You can check your Mac CPU performance and manage it by using the built-in Activity Monitor application. The Activity Monitor is a utility on Mac that monitors performance for programs that are running on the computer. Like a car, your Mac needs to be monitored and cared for to keep it running as smoothly as possible. While your vehicle comes with a ton of gauges to keep track of your oil, temperature, and in some cases, even tire pressure, your Mac has no easy way to watch for low memory or high disk usage. Normally you would have to open up Activity Monitor to take a look at your usage stats, but now there ... Others report about Chrome high CPU usage on Mac. Usually, problems related to Google Chrome might be caused by malicious extensions, plug-ins, or add-ons. For example, if you have installed a bogus extension which is designed to exploit computer's resources, it will result in high CPU usage by Google Chrome. Is there a way to reduce the CPU usage of Outlook 2011 on the Mac? Outlook for Mac 2011 CPU hovers around 100% the entire day; Outlook high cpu usage after Lion upgrade; Outlook for Mac 2011 crashes or hangs at startup (mega list of things to try when Outlook is misbehaving) The fixes suggested are: Apply the latest updates.