Some notes about getting Linux Mint 22 running on an old MacBook Pro (2009):

* sudo apt install broadcom-sta-dkms
* sudo apt install firmware-b43-installer
* Edit /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf so that:
    wifi.powersave = 2
* Remove 'blacklist b43' from /etc/modprobe/broadcom-sta-dkms.conf