Activity Monitor says imovie using over 100% CPU?

Discussion in 'iMac' started by Drewski, Apr 22, 2013.

  1. Drewski macrumors regular

    Jan 6, 2011
    Somewhere else
    As my 2011 2.7 GHz i5 iMac with 12 GB RAM is optimizing and importing video, I checked the activity monitor and saw up to 130% in the %CPU column. What? I don't understand. FWIW, the CPU is only running at ~ 120°F so it's hardly breaking a sweat. Any ideas?

  2. Intell macrumors P6


    Jan 24, 2010
    Aluminum iMacs have very good cooling, that's why their fans rarely rev up. The CPU is at that because it is using 100% of a single core's worth of power and an additional 30% of another core's power.

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