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After installing Elementary OS 6 Odin on a macbook pro 13" late 2011 , network manager only shows wired network, no wifi.

Output lspci: 03:00.0 Network controller: Broadcom Inc. and subsidiaries BCM4331 802.11a/b/g/n (rev 02)

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After you connect to internet using your smartphone and USB cable, do this

sudo apt install bcmwl-kernel-source

More details here https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx

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  • This do not work for me. i think bcmwl-kernel-source do not include driver for BCM4331 Aug 27 at 15:17
  • It's on the list of supported cards you can find following the link in my answer. I had this issue with my previous laptop, with a different Broadcom card though, and it always worked. I'm sorry if it doesn't for you.
    – Webshaped
    Aug 27 at 18:13
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Based on the source, it looks like you might try the b43 driver. https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx

Specifically, this post suggests following commands:

Remove bcmwl-kernel-source package, then reboot.

sudo apt-get remove --purge bcmwl-kernel-source
sudo reboot

Install b43 broadcom firmware.

sudo apt-get install firmware-b43-installer

Reload package.

sudo modprobe -r b43
sudo modprobe b43
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  • this, didnt work, but i found the solution Sep 6 at 20:17
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I finally make it work,

uninstall all drivers for a fresh install

sudo apt-get purge b43-fwcutter firmware-b43-installer firmware-b43-lpphy-installer firmware-b43legacy-installer bcmwl*

re install only this ones

sudo apt-get install firmware-b43-installer b43-fwcutter

after that remove or comment the blacklisted kernel module bcm43xx in the file /etc/modprobe.d/blacklist.conf. You can do it manually or with this command

keyword='blacklist bcm43xx'; sudo sed -i "/^$keyword/ c#$keyword" blacklist.conf

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