02:00.0 Network controller: Broadcom Corporation BCM4331 802.11a/b/g/n (rev 02)

sudo apt-get remove bcmwl-kernel-source

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

cat /etc/modprobe.d/* | egrep 'bcm'

cd /etc/modprobe.d/

sudo gedit blacklist.conf

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

dmesg | tail -2

[ 5866.172626] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 5870.282827] applesmc: FS! : read arg fail

install_bcm4331.sh

chmod +x install_bcm4332.sh

sudo ./install_bcm4332.sh