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iMac G4 17" 1.25 GHz Modelo M9168LLA PowerMac 6,1 introducido en 2003.

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iMac G4 not connecting to WiFi

I have two iMac G4, both 20-inch models, PowerMac6,3

One is running Mac OS X Leopard which connects to the WiFi just fine.

AirPort Extreme, Locale: Unknown, Firmware: Broadcom BCM43xx 1.0

My second G4 is running Mac OS X Panther which detects all the available networks but it doesn’t connect to any even when the password is correct.

AirPort Card Information…

Wireless Card Type: AirPort Extreme

Locale: Worldwide

Firmware: 3.2GMc1

Current Wireless Network: wireless network not available

Modem Information…

Firmware Version: APPLE VERSION 2.6.1

Driver: InternalUSBModem.kext (v2.6.1)

Modem: Dash2 (V.92) Australia 1.0F

Country: 9 (Australia)

Interface Type: USB

I read in another post that G4 does not recognise WPA2 and I might need to change my router setting to WPA. But then how come one works and the other one doesn’t?

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Here’s a good primer on WiFi security protocols Wireless Security Protocols: WEP, WPA, and WPA2 To add to this your WiFi router (AP) may not allow the older WEP connection as its just not secure!

Time to upgrade the OS-X to the newest your systems can support so you can use the best WiFi security they offer.

Even still WPA is not as secure as WPA2 and we even have a newer version! WPA3 which your systems just can’t handle as well.

If you need to use these older systems I would recommend you make the investment into more modern WiFi products like Eero Mesh 3 pack. Then using these instead of the built-in WiFi via the built-in Ethernet connection of your systems, You’ll also gain speed as well!

Do keep in mind these systems are just not safe on the internet. These older OS-X systems just don’t have the most upto date security updates! Don’t store anything that can be used by information thefts on your system.

Lastly, Web standards have moved on, as such many web sites won’t work properly with the older web browser you are using. (HTML4 Vs HTML5) Here’s a primer on them Web Standards: The What, The Why, And The How

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Hopefully you have solved it by now, but I just found myself in a similar situation: I have two iMacG4 20”, both with Airport Extreme cards installed, both running OS X Tiger. One of them can access the internet through my router, the other one cannot. Still early days in trying to trouble shoot, but when I have solved it I will post the solution here. (And as it is evidently 100% possible to get out on the internet with this hardware/software setup, I will not come with suggestions to upgrade software/hardware :-)

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@bjorn68 - The issue is the WiFi connection Vs the Ethernet connection. Take your questionable system near your router and directly connect it via Ethernet I think you'll see your system is working.

But you have another issues! Tiger is not secure and doesn't support the newest HTML code stream (via Safari) so you'll need a good antivirus/malware app and a newer web browser.

If you can I would run down a copy OS-X Leopard (10.5.8) that has some improvements.

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I actually have a dual boot with Tiger/ Leopard on one of the machines, but Tiger is snappier. Web browsing is not really that enjoyable on the G4/20", it is more that I just want to make it work, once that is solved I can go offline :-)

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@bjorn68 - Then just use the Ethernet connection.

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So now I got the WiFI to work on both iMac G4 20" (PowerMac6,3). I have to back away from my earlier statement that I would not recommend software updating: What I had forgotten was that you do need to update OS X Tiger to 10.4.11 + all other security updates and all. Once I had done that (by connecting to the router via Ethernet cable), I was able to connect the iMac to the router over WiFi , using WPA Personal encryption. (And yes: I know this is not secure and all that, and I know this is a very old computer. I simply find it entertaining to get these old machines to work, and even if connecting over Ethernet works and is easier, it would hurt my pride if I did not manage to solve a thing like getting WiFi to work :-) ) BTW: the router (LinksysWRT1900AC) has WPA2 Personal encryption set, and I did not have to lower that to make it work)

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@bjorn68 - That makes sense now! Yes, I always recommend applying the updates for the given OS in your case Tiger. I never encountered any issues with Leopard being slower on a fresh drive. But I have seen issues with HD drives who over years of use get fragmented so upgrading the OS can slow down as the OS ends up highly fragmented!

As far as WPA vs WPA2, WPA2 is downward compatible with WPA connections (unless your force it so only WPA2 connections are allowed at the AP (Access Point, Router)

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