Hi folks, it is my first post (me being a linux/windows user recently starting to use Macs). I have one MacBook pro (10.6.8), 4GB Ram, 500 GB Hard drive, 2.3 GHz core i5; and one Mac Mini (10.8.2), 4GB Ram, 500 GB Hard drive, 2.3 GHz core i5. I use both of them to run graphic simulation (using C++/opengl). The big problem is: Mac Mini is about 5 times slower than MacBook. My question is WHY? Both the computers use the same compiler, same libraries, same code... I was wondering it may be because of the display: mac mini is hooked up with a VGA monitor. So, I turned off the graphics-heavy part, and just ran the simulation (which produces data files only). Still no luck Also, can the operating system make a difference? I thought the newer the faster. Any thoughts/suggestions/stupid little tricks?