Last night, I saw that link and tried to follow the direction, but it was too confusing for a newbie like me.
first of all I d/l amd-insn-patcher, extracted in my desktop, cd to desktop then I ran ,

sudo ./amd_insn_patcher /System/Library/QuickTime/QuickTimeComponents.component/Contents/MacOS/QuickTimeComponents /System/Library/QuickTime/QuickTimeComponents.component/Contents/MacOS/QuickTimeComponents

sudo ./amd_insn_patcher /usr/lib/libSystem.B.dylib /usr/lib/libSystem.B.dylib and at last type sudo ./amd_insn_patcher /usr/lib/dyld /usr/lib/dyld

but it said it can't find it or whatever the error it gave me, so I could not do it.
What I had to do was to make the all file visible, then moved the extracted files to usr/bin then I ran the terminal command instructed by akimoa but I wasn't even sure I was doing it right or not.

I got it all working now but I would like to know how to run this properly just in case if I decided to fresh install on other system. Please give a little more detailed instruction if you can, thanks.