No Network Adapter Found After Installing Ubuntu 19.10(iMac)

EDLIU

macrumors regular
Original poster
Oct 20, 2015
169
1
I have an old iMac that I'm trying to install Ubuntu 19.10 on it.

After the installing, I cannot setup my Network. A message showed that: No Network Adapter Found.

Is this because my old iMac has a broken Network Adapter?

Or the Network Adapter is not supported. Will the problem be solved if I wire connect my old iMac while installing the Ubuntu and let it download updates?
 

Darth.Titan

macrumors 68030
Oct 31, 2007
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Austin, TX
We’d need to know more about the exact iMac model you have.
It might just be a matter of installing the correct driver.

Also, are you trying to use ethernet or wireless networking?
 

revmacian

macrumors 65816
Oct 20, 2018
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USA
Could be you just need the proper driver. This same thing happened to me a week ago while trying to install Ubuntu on an hp Pavilion x360 laptop - no wireless network adapter found.
 

EDLIU

macrumors regular
Original poster
Oct 20, 2015
169
1
Could be you just need the proper driver. This same thing happened to me a week ago while trying to install Ubuntu on an hp Pavilion x360 laptop - no wireless network adapter found.
So how do I get the proper driver for my network adapter? How do I know what driver my network adapter need?
 

casperes1996

macrumors 601
Jan 26, 2014
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Horsens, Denmark
See @casperes1996 post, sounds like he’s done this before. I had to compile my Realtek driver, hopefully you won’t have to go to that extreme.
Not on that exact model, of machine, but I Googled it and it has a Broadcom chip, which I have worked with on Ubuntu before. Depending on the specific Broadcom chip it's varying levels of difficulties. Most of the Broadcom chips Apple have used are common enough that they are bundled with the install media, but as my post mentioned not installed by default.
If it doesn't appear in the additional drivers list, there are lots of good resources for Broadcom wireless on Linux. If memory serves the drivers I needed for my old laptop's Broadcom chip was something like "Broadcom-sta wl [version number]"
 
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EDLIU

macrumors regular
Original poster
Oct 20, 2015
169
1
You may need to enable Broadcom drivers, since they are proprietary. I believe they come on the install media but not installed by default. With the install medium in go to Additional Drivers and enabled the Broadcom drivers, and report back if it worked
So I install Ubuntu, go to Additional Drivers after installation, and enable the Broadcom drivers. But how do I know the version number and how do I enable the drivers?

Moreover, what about the firmware? Is it possible that the firmware is missing? Will it help if I wired connect my iMac while installing the os?
 
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casperes1996

macrumors 601
Jan 26, 2014
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So I install Ubuntu, go to Additional Drivers after installation, and enable the Broadcom drivers. But how do I know the version number and how do I enable the drivers?

Moreover, what about the firmware? Is it possible that the firmware is missing? Will it help if I wired connect my iMac while installing the os?
The Additional Drivers utility should auto detect your hardware and allow you to select the required Broadcom driver. Select it, click apply. A wired connection shouldn't be necessary. if the one on the installer isn't the latest, it should still get you on Wi-Fi and letterboxed you upgrade it the usual way afterwards.

You don't need to worry about firmware stuff. Firmware is on hardware ROM chips and not dependant on the operating system you install (generally speaking)
 

throAU

macrumors 603
Feb 13, 2012
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Perth, Western Australia
I have an old iMac that I'm trying to install Ubuntu 19.10 on it.

After the installing, I cannot setup my Network. A message showed that: No Network Adapter Found.

Is this because my old iMac has a broken Network Adapter?

Or the Network Adapter is not supported. Will the problem be solved if I wire connect my old iMac while installing the Ubuntu and let it download updates?
It may be that the builtin network adapter is not supported by Ubuntu.

You can maybe work around that with a cheap USB network adapter until you can figure it out. The Apple USB2 ethernet adapter works in Ubuntu, as will most USB network adapters i believe.