Ubuntu can't detect wifi networks on macbookpro 13.3

I'm new to Ubuntu and Linux in general and I'm not sure how to go about setting up my wifi. It doesn't detect any networks.

I'm using a late-2013 13.3" macbookpro with retina display, so it doesn't come with an ethernet port. I used this installation guide to dual boot Mac OSx and Ubuntu 14.04.

https://help.ubuntu.com/community/MacBookPro11-1/Saucy

I have a second computer that runs windows 7 that I'm using to research this and I want to avoid purchasing an ethernet adapter if possible.

I also did not install/download any of the updates as a result.

Please run:

lspci -nn | grep 0280

The pipe symbol | is on the right side of my US keyboard on the same key with '\'. Is this your device?

Broadcom Corporation BCM4360 802.11ac Wireless Network Adapter [14e4:43a0] (rev 03)

If so, then bcmwl-kernel-source is correct for your device. If you still have the install DVD or USB, then you can find it and its prerequisite there. Navigate to pool > restricted > b > bcmwl and drag and drop the deb file to your desktop. Now navigate to pool > main > d > dkms and drag and drop dkms to your desktop. Now install both with:

cd ~/Desktop
sudo dpkg -i *.deb

Load the driver:

sudo modprobe wl

Your wireless should now be working.

If your device is not 14e4:43a0, tell us what it actually is and we'll proceed.

Possible Solution Copied from Installing Broadcom Wireless Drivers

• Uninstall the bcmwl-kernel-source package by issuing the following command on a terminal:

  sudo apt-get remove bcmwl-kernel-source
  

• make sure that the firmware-b43-installer and the b43-fwcutter packages are installed (of course you will need internet by others means):

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

• type into terminal:

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

  (you may want to copy this) and see if the term 'blacklist bcm43xx' is there

• if it is, type cd /etc/modprobe.d/ and then sudo gedit blacklist.conf

  put a # in front of the line: blacklist bcm43xx

  then save the file (I was getting error messages in the terminal about not being able to save, but it actually did save properly).

• reboot

After I did the above the wireless had to be unblocked by rfkill: How to unblock something listed in rfkill?