Hey all, this is my first post. I hope it's in the correct forum. I want to upgrade the memory in my white 2.0GHz Macbook (purchased May 2007) and am trying to figure out two things: (1) What my Macbook model # is (e.g., MA255LL/A, MB061LL/A, MA701LL/A, etc...) (2) Whether it takes a maximum of 2 GB or 4 GB RAM. I've searched the internet, these forums, and a few websites and found conflicting information about this.... OWC says this, which makes me think it takes 4 GB (http://eshop.macsales.com/shop/memory/Apple_MacBook_MacBook_Pro/Upgrade): *Core Duo 2.0GHz model supports up to 2GB Memory; May 2007 MacBook 2.0GHz model supports up to 4.0GB Memory; Late 2007 'Santa Rosa' MacBook 2.0GHz Model supports up to 6.0GB of memory. Apple says this, which makes me think it has a 2GB max (http://support.apple.com/kb/HT1651): MacBook (Mid 2007)... Your MacBook computer has two memory slots... Both memory slots can accept an SDRAM module that meets the following specifications... 512 MB or 1 gigabyte (GB) Crucial's Mac Scanner said this, which makes me think it has a 2GB max, but it told me I have a black, not white, macbook: Guaranteed-compatible memory upgrades for your MacBook 2.0GHz Intel Core 2 Duo (13-inch Black) MA701LL/A Laptop/Notebook. 2GB Total And finally, I downloaded and used the Mactracker software, which said that my macbook was either the "Late 2006" or "Mid 2007" model.... not much help, and I can't find the original documentation that came with my macbook so if it's on there, well I don't have it. Here is the info from the system profiler: Model Name: MacBook Model Identifier: MacBook2,1 Processor Name: Intel Core 2 Duo Processor Speed: 2 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache (per processor): 4 MB Memory: 1 GB Bus Speed: 667 MHz Boot ROM Version: MB21.00A5.B07 SMC Version: 1.17f0 Any help or info will be much appreciated. Thanks!