Final Cut Pro X - Mac Book Pro 10.8.5

Hi everyone,

It's my first time using this forum: If I am doing something wrong, please let me know and I appologize for it.
My question is about the Final Cut pro X which isn't runing smoothly and I am wondering why.

The MAC I use:

Mac book pro 2012

Processor: 2,5 GHz Intel Core i5

Memory: 8GB 1600 MHz DDR3

Grapich: Intel HD Graphic 4000 512MB
Software: OS X 10.8.5

Display: 13 Inch (1280 x 800)

Storage
129,96 GB Free out of 499, 25GB

According to the Final Cut pro X System Requirements I guess I have everything for it to works properly.

Final Cut pro X System Requirements:

• Mac computer with an Intel Core 2 Duo processor or better.
• 2GB of RAM (4GB of RAM recommended).
• OpenCL-capable graphics card or
  Intel HD Graphics 3000 or later.
• 256MB of VRAM (512MB of VRAM recommended).
• Display with 1280-by-768 resolution or higher.
• OS X v10.6.8 or OS X v10.7.5 or OS X v10.8.3 or later.
• 2.4GB of disk space.

Am I wrong? Please, how can I fix this problem?

Before I edit the video I always do proxy (Apple ProRess 422 HQ) and then I edit It. The problem comes out even when I put only one video (of 2mins) in the time line and It happens only when I do the color correction (If I use the magic bulets looks for example, the final cut will crush) or If I use only the final cut color correction process like sharpen, color balance, 3-way-color correction it will get crushed as well.

I really don't understand nothing about computer system, so I hope that what I wrote here is enought to let you understand what's going on.

Thank you for any help you can provide.