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Apple MacBook "Core Duo" 1.83 13" Specs
Identifiers: MacBook - MA254LL/A -
MacBook1,1 - A1181 - 2092Introduction Date: May 16, 2006
RAM Type: PC2-5300 DDR2 Min. RAM Speed: 667 MHz
Details: Supports 667 MHz PC2-5300 DDR2 SDRAM.
Standard RAM: 512 MB Maximum RAM: 2 GB
Apple MacBook "Core 2 Duo" 2.0 13" (White/06) Specs
Identifiers: Late 2006 - MA700LL/A -
MacBook2,1 - A1181 - 2121RAM Type: PC2-5300 DDR2 Min. RAM Speed: 667 MHz
Details: Supports 667 MHz PC2-5300 DDR2 SDRAM.
Standard RAM: 1 GB Maximum RAM: 4 GB*
Details: 1 GB of RAM is installed as two 512 MB modules, no slots free.
*Apple officially supports 2 GB of RAM, but third-parties have been "unofficially" able to upgrade it to 3 GB or 4 GB of RAM (it can hold 4 GB but cannot fully utilize the memory beyond 3 GB due to the same
Apple MacBook "Core 2 Duo" 2.4 13" (Black-08) Specs
Identifiers: Early 2008 - MB404LL/A -
MacBook4,1 - A1181 - 2242RAM Type: PC2-5300 DDR2 Min. RAM Speed: 667 MHz
Standard RAM: 2 GB Maximum RAM: 6 GB*
Details: 2 GB of RAM is installed as two 1 GB modules, no slots free.
*Apple officially supports a maximum of 4 GB of RAM but third-parties have been able to upgrade the system to 6 GB of RAM using one 2 GB and one 4 GB memory module.
Ну и если Вы не поняли - A1181 - разными бывают, нужен другой идентификатор!