Intel 4 Express Chipset Family Driver for Mac-OS Lion

Processor - Intel Pentium T4400

GPU - Intel 4 Express Chipset Family

Ram - 5GB (2x1, 3x1)

Laptop - Acer 4736Z

Hi, today I was installing Mac-OS Lion, and after installation I am getting 800x600 resolution.

I can't find the graphics drivers for my GPU, if anybody know where I can find the drivers please tell me.

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Thanks...