The G5 iMac, Ambient Light Sensor model # A1076, had built in Airport Extreme 802.11b/g.
You need to go to the Intel-based (Late 2006) iMac, model # iMac5,1, to get a built in AirPort Extreme 802.11a/b/g/n.
I'm not sure if this is a concern, but you have an iPhone 5 (and maybe any iPhone upgraded to iOS 6), you need iTunes 10.7, which is only available to Intel-based Macs.
I hope this helps.
Thank you Rambling Joe.
I am not seeking built-in wireless. I only want 802.11g, not 802.11n.
But what you said does raise the question of
(1) whether all Intel-baed iMacs have built-in wireless, and
(2) when did they go to the "n" spec (which I do NOT want!), and
(3) whether it is possible to disable built-in wireless and add a card to substitute the "g" spec. (I doubt that is possible, but I'm sure somebody here knows the answer.)
This is the key question: "what Macs are compatible with an Airport Extreme 802.11g card?"
The 'n' spec was added with the Late 2006 iMac with an $1 upgrade software from Apple.
This looks like your iMac:
If the specs look right going by the info in the System Profiler in Apple menu -> About This Mac, you may or may not have an Airport Extreme card installed. You can use these instructions to determine that:
If it isn't there, you can purchase the card from:
If it is there, and won't contact your 2Wire Router, make sure you temporarily open its network, and add it to the allowed clients on your 2Wire router. 2Wire should give you instructions on how to do it. You can find your MAC Network address in Apple menu -> About this Mac -> System Information or More info under the Airport or WiFi section.
Yes, that looks like our iMac, too bad it won't start. I wish I could find some kind soul who does this capacitor repair and would give us a break and just solder in the ONE bad capacitor that obviously needs replacing. This might fix everything, and we just can't afford the full replacement.
That is great information you sent. Thank you so much for those links!