Posted 06 January 2010 - 12:18 PM
I am assuming since you didn't actually say it that the PC is wired and the Mac is wireless.
Have you looked at the channels, both on the router and on the Mac? Perhaps changing them to the same channel might clear it up. And you might have to change them a couple of times if there are other wireless networks in the area.
The other thing to look at is the standard, G , B, N. If the Mac has an N set the router to only N, or G if its G.
Is there a cordless phone close to the router? It does operate at 2.4 Ghz and altho they shouldn't interfere if its close to the router it could very easily.
Is there a florescent light near it? Even one of the new florescent bulbs might do it.
I give this advice because if you can connect to other networks, I assume in your same building, then there is no interference between the Mac and that network. You took it into the store and it all worked fine. So its something in your place that is causing the issues. Wireless is a pain when its not working correctly lol. But Oh So SWEET when its working fine.
Hope this helps
Associate in Applied Science - Network Systems Management - Trident Technical College