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Helpful answers
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Apr 20, 2012 6:32 AM in response to smerelsby a brody,WiFi works best in a range of 10 feet (3.048 meters) to 150 feet from the transmitter.
WiFi works best if you use WPA2 encryption. This is not possible if your Mac is the original Airport 802.11b, unless you attach a WiFi ethernet bridge router and connect to its LAN port. It has to be Extreme to get at least 802.11g. Starting late in 2006, patches were available to upgrade Macs to 802.11n, and by late 2007, all Macs had built-in 802.11n. Obviously the slowest machine on the network will drag the speed of the entire network. Microwave and 2.4 Ghz frequencies, and unshielded speakers can all affect the strength of the wireless signal. Not all iMacs have builit-in airport. To determine if yours does, identify it first using the first article below, and then read the following article to determine if Extreme was included:
http://docs.info.apple.com/article.html?artnum=301724
http://support.apple.com/kb/HT2256
All Intel iMacs have built-in Airport Extreme cards. If you find it isn't working, and the above tips don't work, let us know which iMac you have, and we can tell you what step to take next.
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Apr 20, 2012 6:40 AM in response to a brodyby smerels,I have a Mac os x version 10.7.3 intel
It did work before but already for a few weeks it kept droping out.
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Apr 20, 2012 6:43 AM in response to smerelsby a brody,Run the hardware test that came with your Mac: