Hello there, ihv been using osx 10.8 for last 3 years or so. Except some odds it was going ok for me... Couple of weeks back I updated my macbook pro to Yosemite... First week things were ok... However, two nights back, chrome and safari started freezing... I surfed the net to get a solution... Last 24 hours I guess I hv tried few of the solutions, still the problem occurs... From safemode I hv installed chrome (thinking its extensions are causing the problem)... I also tried clearing the PRAM, used disk utility to check hardware or file system error bla bla... the problem is still there... I feel reinstalling os may be the solution... But I'm considering it as my last action... Just wondering, if there is any mac geek who can rescue me...