HT4628 some times my internet connection will say it has timed out and I can not connect. but my friends mac never has a problem. How can I fix this?

some times my internet connection will say it has timed out and I can not connect. but my friends mac never has a problem. How can I fix this?

Just confirming, when you have the trouble, the wifi icon is grayed-out or has all bars showing? I believe you are saying that is is grayed-out - not connected to your wireless router.
I have a Mini that started to lose connection to the Internet after the 10.7.3 update but still showed the wireless as connected. If I pinged the wireless router, I would get a quarter of the packets failing to return. The router was a Netgear that supported 802.11N connections. As a test, I set it to 802.11G (54MBps) maximum and the Mini worked fine for a week - no dropouts. And for the other devices that did support 802.11N, while there was a noticeable delay with downloads and pages loading, they still worked.
As another test, I changed the Netgear router to a Billion 802.11N model and the Mini has not had a problems since. (It is still using 802.11g). So it could be your router that is causing trouble for your Mac.
Have a look at some of the More Like This postings in the right column. There has been a number of Mac owners experiencing wifi connection issues and some very good suggestions as to how to resolve their issue.

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