I installed elementary OS 5.1 on a 2011 Mac Mini.
During the installation process, the installer recognized the wifi card and downloaded updates during the install. After a re-boot, the wifi was no longer recognized. I installed the b43 drivers to correct the problem:
sudo apt-get install firmware-b43-installer
Why did the wifi work during install, but not after? If there something I could have done to avoid this issue?