What is causing the high system CPU load under Mountain Lion?
I recently began to see some odd behavior on my MacBook Pro on Mountain Lion. I noticed the fans coming up and applications behaving sluggish. I checked the ActivityMonitor (see below) and the results kept me puzzled: Although I list all processes, only very few show up that cause medium CPU usage, still the system CPU is at close to 70%.
I've wondered about this behavior quite a while ago already and then - just as now - the problem just went away after about 10-15 minutes of lagging and fanning.
What can cause these symptoms? Why isn't the "thing" causing the CPU load showing up in the process list? How can I diagnose the issue in more detail?
I recently began to see some odd behavior on my MacBook Pro on Mountain Lion. I noticed the fans coming up and applications behaving sluggish. I checked the ActivityMonitor (see below) and the results kept me puzzled: Although I list all processes, only very few show up that cause medium CPU usage, still the system CPU is at close to 70%.
I've wondered about this behavior quite a while ago already and then - just as now - the problem just went away after about 10-15 minutes of lagging and fanning.
What can cause these symptoms? Why isn't the "thing" causing the CPU load showing up in the process list? How can I diagnose the issue in more detail?
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