|Not exactly a MAC guy, but I have networked them. If you're losing connections my Q's are: |
1. What's the signal strength? The lower the signal, the worse your performance will be.
2. Are you using WiFi Encryption at all? If you're using encryption, especially WPA2 you really need a strong signal and good solid, healthy equipment, otherwise connectivity issues can arise.
3. Is the router firmware up to date? Check on netgear site for “Firmware updates” (microcode instructions for your ROM hardware) for your particular hardware.
4. Are your wireless drivers current for your wireless card in your iMac? Check to see if there are new & improved software drivers for your WiFi network adapters in your computer.
5. Is your iMac free from malware? Malware can cause issues with connectivity, and yes, Macs can catch viruses, Trojans and Malware.
6. Do you have cordless phones in your house that are on the same band (frequency) as your WiFi equipment? I.e. if you have 802.11g 2.4 GHz (gigahertz) WiFi equipment and 2.4 GHz cordless phones, sometimes the phones can interfere with the computer WiFi stuff.
7. Check your SSID (service set identifier), and check to see if there are other WiFi equipment near you with the same SSID possibly interfering with your devices. By changing your default SSID you won't be contacting a neighbor’s router with the same SSID. Check your router's channel number and try other channels (1, 6 or 11) if you are having trouble connecting.
8. In order for WiFi to work properly, make sure you place your WiFi router near the center of the area in which your computers will operate and elevate the router as high as possible to broadcast the signal better. Possible sources of interference are other Ad Hoc PCs, microwaves, cordless phones. Structural issues can cause wireless signal interference too - dense brick buildings, metal buildings etc.
9. You could have faulty equipment: bad or flaky router, Cable/DSL modem, wireless cards in a PC etc as well. Sometimes they die slowly instead of right away.
10. Your ISP could also be having connectivity issues. You could attach a computer right to the Modem, bypassing the WiFi router, to test if the connection is stable.