Wifi works but Internet doesn't work on MacBook, works on other computers

My Internet has never been a problem. two days ago it suddenly stopped working on my new mac book. I turned it off and restarted but the Internet (both safari and firefox) won't load. The Internet works fine on my roommates computers. Also at school the Internet is working normally. As well, the mac book says it's connected to our network but the pages just never load. Any help is appreciated.

Hi JaschaW,
Can you try to update me with more specific details. The only idea I can think of now, is for you to :
1) Open System Preferences>Network.
2) Click on Airport, go to TCP/IP.....check if there's any setting being set to Manual on the IP address part.
OR you can try doing this....
Shut down your mac.
Switch it on back......now quickly press the Apple Key + the "S" key. Hold it there, until a black screen is prompted. It will prompt you to type a command, in order for you to proceed to boot normally. Do that....after that another prompt....type "exit" without the inverted comma.
Try that....let me know if it works....
Cheers
Shean

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