some webpages which i use regularly are not opening in my macbook pro. its the same problem even when i open with guest account. it opens other websites just fine. but websites like facebook, google search (default in the address bar ) does not load . its been almost 4-5 days. its not internet problem as all my friends laptop runn all the websites. i have tried all browsers . only these particular websites are not loading in all borwsers.i have tried looking internet for solutions but only got solutions for pc but not for mac . so pease help me how to open them.