The quickest way to make your MacBook run faster is to add more RAM. Whether you own a MacBook Air, a 13" MacBook or a MacBook Pro 15" or 17", adding memory will make your machine run better. The Mac OS works best with plenty of RAM and as mainstream software applications get bigger and more complex, the more memory they need.
Fortunately, the price of RAM has dropped in the last few years and upgrading memory is not the mortgage-extending exercise it once was. Now there's no excuse for having too little RAM.
The MacBook Air takes 2 x 1 GB to a max of 2 GB.
Early 13" MacBook models could only support 2 GB of memory but late-2006 MacBooks could address 3GB if 2 x 2GB modules were installed (although Apple specs said not) and late-2007 MacBooks can address the full 4GB.
Early MacBook Pro 15"s and 17"s were maxed out at 2 GB but the first Core 2 Duo models could address 3 GB if 2 x 2GB modules were installed and the mid/late 2007 models can address the full 4GB.
If you're unsure which model MacBook you have, check with Apple.
Here's a selection of MacBook 1 GB memory modules in a range of prices:
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US $34.33
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US $42.90
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US $39.99
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US $32.33
Ends in 9h 53m
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US $38.50
Ends in 14h 11m
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US $33.70
Ends in 18h 41m
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US $15.99
Ends in 1d 8h 5m
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US $22.90
Ends in 1d 15h 58m
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US $26.99
Ends in 2d 5h 52m
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Tags: macbook, MacBook Air, macbook pro, MacBook pro 15, memory, RAM
...how it works and
NEW Apple MacBook Pro 15-inch LED Part No. MC371LL/A

1GB RAM MEMORY UPGRADE FOR APPLE MACBOOK MA254LL/A
2GB 2X 1GB Intel Apple iMac Macbook Pro Mini ram memory
2GB KIT 1GB X 2 APPLE MacBook Pro MEMORY RAM PC2-5300
1GB 1 GB RAM MEMORY Apple MacBook 2.0GHz
1GB DDR2 800MHz 200-PIN SODIMM INTEL IMAC/MACBOOK RAM
1 GB 667 PC-5300 fit Apple MacBook Pro iMAC 1GB MAC RAM
1GB KIT 512MB X 2 APPLE MacBook MEMORY RAM PC2-5300 MAC
1GB Intel Apple iMac Macbook Pro Mini MAC ram memory
Two 1GB RAM Memory Modules for Apple Mac Book Pro 