This version of OS X 10.11 cannot be installed on this computer.

Hi!

I have a MacBook with the next characteristics but I can't install the OS X Capitan.

Model Name: MacBook (13 inch, early 2008)

Model Identifier: MacBook4,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.4 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache: 3 MB

Memory: 3 GB

Bus Speed: 800 MHz

Boot ROM Version: MB41.00C1.B00

SMC Version (system): 1.31f1

Serial Number (system): W8815FDS0P2

Software OS X 10.8.4 (MLPostFactor V0.3)

Graphics Intel GMA X3100 144 MB

Could anyone help me about what's wrong with my computer please?

Thanks!