MacBook Pro users are encountering some issues AirPort doesn't automatically rejoin a network after returning from sleep mode Airport would drop down to 1 block randomly At the lowest screen setting, the backlit flickers Heat issues, the laptop gets extremely hot Dont worry,,This issues are well known. Known well enough in fact, that Apple has already started addressing these issues in updated MacBook Pros. According to Apple, it has begun replacing the mainboard inside its MacBook Pros with a new revision. It calls the udpated product "revision D", which is identifiable by product serial number. Serial numbers starting with W8611: revision D Serial numbers starting with W8610: revision C Those who are having issues with their MacBook Pros should first check for the identifying serial number, and then contact Apple to address the issue.