My PC:
Intel Core 2 Quad Q8200

Windows 7 Ultimate Edition 64-bit SP1 (Build 7601)
CPU Arch : 1 CPU - 4 Cores - 4 Threads
CPU PSN : Intel Core2 Quad CPU Q8200 @ 2.33GHz
CPU EXT : MMX, SSE (1, 2, 3, 3S, 4.1), EM64T
CPUID : 6.7.A / Extended : 6.17
CPU Cache : L1 : 4 x 32 / 4 x 32 KB - L2 : 2 x 2048 KB
Core : Yorkfield (45 nm) / Stepping : R0
Freq : 1999.9 MHz (333.32 * 6)
MB Brand : Gigabyte
MB Model : P31-ES3G
NB : Intel P35/G33/G31 rev 10
SB : Intel 82801GB (ICH7/R) rev A1
GPU Type : NVIDIA GeForce 8400 GS
GPU Clocks : Core 650 MHz / RAM 400 MHz
DirectX Version : 11.0
RAM : 4096 MB DDR2 Dual Channel
RAM Speed : 400 MHz (5:6) @ 6-6-6-18
Slot 1 : 2048MB (8900)
Slot 1 Manufacturer : Kingmax Semiconductor
Slot 2 : 2048MB (6400)
Slot 2 Manufacturer : Kingmax Semiconductor

Plz give me some advices for Mac OS version. Thx a lot. Sry I'm a newbie