2.16 GHz Mac Book 4.0 GB RAM Installed

Discussion in 'MacBook' started by eljanitor, Oct 30, 2011.

  1. eljanitor macrumors 6502


    Feb 10, 2011
    So I've been using this MacBook for many years now, and it's been a great machine. I recently decided to upgrade the RAM again from 2 GB to 4GB, even though I had read that it will only use 3GB max. I installed Lion and I wasn't happy with the performance I was getting out of it with 2GB.

    I installed the 4 GB and was surprised when it showed me 4GB in the System Profiler. So I thought maybe it is going to use all 4GB and all that stuff I read was false. So I'm a bit confused here, I go into Activity Monitor and check the RAM usage and it says 3GB.

    That's kind of disappointing that it really does max out at 3 GB, so 1 GB just goes to waste. Is there a way to make the OS recognize and use the remaining 1GB?

    Attached Files:

  2. r.j.s Moderator emeritus


    Mar 7, 2007
    No, it's a hardware limitation.

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