Sharing internet connection from MacBook Pro to iMac G3

My goal here is to connect my iMac G3 (that I just got) to my cable internet connection. However, there are some hurdles in doing so. On the other side of my house lies my modem. It's connected to a D-Link wireless router to give my PC, Xbox 360, Wii and MacBook Pro internet all at the same time. It's too far to drag an ethernet cable, and the iMac G3 doesn't have an AirPort card (and $99 for a used wireless b adapter is ridiculous).

From what I've gathered online, OS X can share it's internet connection with another Mac via FireWire, ethernet or AirPort. AirPort is out of the question since that's how my MacBook Pro connects to the net, and since the iMac G3 doesn't have an AirPort card. I don't have anything that uses FireWire, so othe port on both machines is free, but I also don't have a cable to connect the two. I do, however, have a few spare ethernet cables, so I'd like to get this setup using them.

Thing is, I can't get it to work. Simply enabling internet sharing in System Preferences does diddly squat, and no connection is found with Network Utility on the iMac. What I'd really like here is for someone to either instruct me on how to get this to work, or point me in the direction of such an article. I haven't been able to find anything with Google so far...

Now, my MacBook Pro obvioously runs 10.4.9 with all the updates. The iMac G3, however, is running 10.3.5 at the moment. While I will be upgrading it to tiger in the near future, I kinda wanted to play around with Internet Expplorer before doing so. Being new to the Mac and all (the MBP is my first Mac), I've never used Internet Exporer on the Mac -- or 10.3 at all really, for that matter. So if it can be done, I'd like to do this with 10.3 still on the iMac, though I could upgrade it to tiger if I HAD to.

Should it matter, the iMac G3 is a 400MHz indigo unit with 256MB RAM and a 10GB HDD. It's the summer '00 model. The MacBook Pro is a revision A system with a 1.83GHz Core Duo inside. More detailed specs can be found within my profile on here, I believe.

Sorry for such a long winded post...

1.83GHz MacBook Pro 15"; 400MHz iMac G3 Indigo Mac OS X (10.4.9)

Posted on Jun 10, 2007 4:17 PM

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20 replies

Jun 10, 2007 4:35 PM in response to Winnopeg

I don't have anything that uses FireWire, so othe port on both machines is free, but I also don't have a cable to connect the two. I do, however, have a few spare ethernet cables, so I'd like to get this setup using them.


Lost me there... is it Ethernet cables you're using even though it's too far? Or What?

Should be no problem Sharing the Internet connection from 101.4.9 to 10.3.x.

Just waiting for more info or clarity. 🙂

Jun 10, 2007 8:36 PM in response to Winnopeg

Oh, so you want to Share the MBP's Wireless Internet connection with the G3 via Ethernet! No pronlem.

In System Preferences>Sharing>Internet Tab, simply select Share yur connection from:... then chooze Airpoert or en1, or whatever the Wireless is, then in the box below& left choose/checkmark... To Computers using... Ethernet, click Start, wait a few minutes and have the G3 join the MBP's Network.

Jun 10, 2007 8:49 PM in response to BDAqua

I've had Internet Sharing enabled in System Preferences since yesterday. The MBP says it's sharing it's connection, while the iMac refuses to acknowledge the MBP or use it's connection. I figured I didn't enable something, but if that's all that's required something must be up...

And before anyone suggests the ethernet cable is faulty, I've already tried two different cables. :P

Jun 10, 2007 9:14 PM in response to BDAqua

Not that I know of? Like I said, the modem connects to the D-Link router (with factory default settings other than name). From there, I've got a PC connected to the router wirelessly, the Wii wirelessly and my MacBook Pro wirelessly (the 360 is in for repair).

Would it help you if I were to take a screenshot of System Profiler's network section on both machines and upload them?

Jun 10, 2007 10:19 PM in response to Winnopeg

Make sure on the G3 that in Network>Show:>Network port Configurations that Ethernet is dragged to the top of the list. On the MBP that Ethernet is second and checked ON.


Well, though Apple says you can't do it Manually...

Let's try, on the G3>Network>TCP/IP>Configure IPv4... set it to "Manually, then put in these numbers...

IP: 192.168.2.101
Subnet Mask 255.255.255.0
Router 192.168.0.100

Apply. If that doesn't work getting to internet, then try an IP of 192.168.1.101

IInternet Sharing isn't on on the G3 perchance?)

Jun 11, 2007 3:17 PM in response to BDAqua

I hadn't, but doing so didn't change anything.

For the sake of making sure the ethernet port worked, I hauled the iMac into the living room and connected it directly to the router. As far as the iMac was concerned, it was connected to a brick wall... It didn't want to detect a **** thing.

I'm starting to think something is wrong with the ethernet port.

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Sharing internet connection from MacBook Pro to iMac G3

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