Dump OS - Available memory question

Discussion in 'macOS' started by maflynn, Sep 5, 2009.

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  1. maflynn, Sep 5, 2009

    maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #1
    Ok guys this a dumb question but I was perplexed so I'll post it here :)

    I have a MBP with 4 gig of ram, when I go into the activity monitor it shows only 3.75gig

    fair enough, I booted (like I always do) the computer using the default 32bit kernel.

    For giggles I rebooted with the 64bit kernel and wouldn't you know it, I still saw 3.75gig?

    Any explanation for that.
     
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  2. Guiyon, Sep 5, 2009

    Guiyon macrumors 6502a

    Joined:
    Mar 19, 2008
    Location:
    North Shore, MA
    #2
    If I recall correctly that model does not have dedicated RAM for the video card so it grabs 256MB from the main memory and, as a result, does not show up for the rest of the system to use.
     
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