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10.5: Use 4GB of RAM in older MacBook Pros
Authored by: QuickSander on Dec 28, '10 02:36:34AM

I just bought 4 GB of RAM and installed it in my late 2006 white iMac 24" (revision B). This iMac only supports 3GB (Mac rumors RAM Buying guide).

In other words: The Activity monitor reports 3GB total while System profiler reports 4GB installed.

But, I created a 1GB RAM drive (which I use to store my Safari Cache directory) and my free available RAM did not lower 1 Byte. Thus, it seems you can use the full 4GB of RAM by:
- Letting the system use 3GB and;
- Create a RAM drive of 1GB (using hdiutil see this hint)

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