No Wireless When Install 14.04 on Macbook Pro

Please do:

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

Reboot if it does not connect post a new file from the script.

No internet:

Download the b43updated.zip file to a usb flash drive then drag and drop the file to your ubuntu desktop. Right-click it and select Extract Here.

Open a terminal and do:

sudo mkdir /lib/firmware/b43
sudo cp Desktop/b43/*  /lib/firmware/b43
sudo modprobe -rv b43 
sudo modprobe -v b43

if it does not come on reboot.

I had the same issue on macMini

>lspci -nn
02:00.0 Network controller [0280]: Broadcom Corporation BCM4331 802.11a/b/g/n [14e4:4331] (rev 02)

and this worked for me:

sudo apt-get purge bcmwl-kernel-source broadcom-sta-common broadcom-sta-source
sudo apt-get install linux-firmware-nonfree b43-fwcutter firmware-b43-installer

and then a reboot