Okay, I have a MacBook White 13'' Late 2009 Model. I have installed Mavericks 10.9. The MacBook has 4GB of RAM and SSD installed. Whenever I run Football Manager 14 and Chrome with 3 tabs open the MacBook runs really slow. In Chrome I can't even scroll down a page. But when switch to Windows the MacBook runs perfect. Photoshop open, Football Manager 14 open, Chrome open and everything is smooth. Why is this happening? Should I switch back to an older version of OS X?