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I wonder why the sum of all processes' real memory listed in Activity Monitor is not equal to (MUCH less than) the used memory?

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Used memory is the sum of Wired + Active + Inactive. I think (but am not certain) that the sum of the real memory would be equal to Active + Inactive. – Nix May 12 '12 at 22:03
    
That's strange, on my mac about 1.5gb of ram is unaccounted for lol – AMomchilov May 20 '12 at 18:54

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