When I run into excessive memory usage by an application on a MacBook Pro laptop I use, the culprit is usually Safari. It is often a culprit in high CPU utilization problems as well. Another common cause for high CPU usage making the system unresponsive is the Symantec Endpoint Protection daemon. Today, after closing a tab with a MacRumors.com webpage open to reduce excessive memory consumption and CPU usage by Safari, I immediately encountered another CPU usage issue caused by SymDaemon.
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