HT4287: Mac OS X: 64-bit kernel frequently asked questions
Learn about Mac OS X: 64-bit kernel frequently asked questions
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Helpful answers
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Dec 11, 2013 10:47 PM in response to moveovermikeby Paul_31,★HelpfulIn layman's terms, it's the heartbeat of the OS - without it running you wouldn't have a working OS. On my late '09 27" iMac kernel_task typically uses 750mb-1gb of memory as shown in Activity Monitor. What you're seeing sounds normal to me.
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Dec 13, 2013 4:28 PM in response to Paul_31by moveovermike,Thanks for the reply. It looks like I need to upgrade from 4-8gb of Ram to make things run a little smoother. Iphoto and Itunes take up a lot!