Wi-Fi Card is not detected on Macbook Pro

Hi everyone! I'm a Ubuntu beginner and I just managed to install it on my mid 2012 Macbook Pro 13". I have been trying to get my Wi-Fi working on it but I haven't had any success so far and it's getting really frustrating now.
I have tried the following steps:

sudo add-apt-repository ppa:mpodroid/mactel
sudo apt-get update
sudo apt-get install b43-fwcutter firmware-b43-installer
sudo apt-get install linux-backports-modules-cw-3.3-precise-generic
Edit the /etc/modprobe.d/blacklist.conf and add the line: blacklist ndiswrapper
Create or edit the file /etc/pm/config.d/modules and make sure the wireless modules (b43 and bcma) are blacklisted: SUSPEND_MODULES="b43 bcma"
Reboot and the wireless should work.

This doesn't help. When I click on the symbol to connect to a network on the top right, I don't have an option to connect to a wireless network. I only have the option to connect to a wired network, which works.
Here's some additional details that might help:

rahul@Rahuls-Macbook:~$ sudo lshw -C network
  *-network
       description: Ethernet interface
       product: 82545EM Gigabit Ethernet Controller (Copper)
       vendor: Intel Corporation
       physical id: 5
       bus info: pci@0000:00:05.0
       logical name: eth0
       version: 00
       serial: 00:1c:42:e7:a6:6a
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 66MHz
       capabilities: msi bus_master cap_list ethernet physical logical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000 driverversion=7.3.21-k8-NAPI duplex=full latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:23 memory:ee000000-ee01ffff ioport:8200(size=32)

rahul@Rahuls-Macbook:~$ sudo lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation 82P965/G965 Memory Controller Hub [8086:29a0] (rev 02)
00:01.0 PCI bridge [0604]: Intel Corporation 82G35 Express PCI Express Root Port [8086:2981] (rev 02)
00:03.0 Unassigned class [ff00]: Device [1ab8:4000]
00:05.0 Ethernet controller [0200]: Intel Corporation 82545EM Gigabit Ethernet Controller (Copper) [8086:100f]
00:0a.0 PCI bridge [0604]: Digital Equipment Corporation DECchip 21150 [1011:0022]
00:0e.0 RAM memory [0500]: Red Hat, Inc Virtio memory balloon [1af4:1002]
00:1d.0 USB controller [0c03]: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 [8086:2658] (rev 02)
00:1d.6 USB controller [0c03]: NEC Corporation uPD720200 USB 3.0 Host Controller [1033:0194] (rev 03)
00:1d.7 USB controller [0c03]: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller [8086:265c] (rev 02)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev f2)
00:1f.0 ISA bridge [0601]: Intel Corporation 82801HB/HR (ICH8/R) LPC Interface Controller [8086:2810] (rev 02)
00:1f.1 IDE interface [0101]: Intel Corporation 82801BA IDE U100 Controller [8086:244b] (rev 05)
00:1f.2 SATA controller [0106]: Intel Corporation 82801HR/HO/HH (ICH8R/DO/DH) 6 port SATA Controller [AHCI mode] [8086:2821] (rev 02)
00:1f.4 Multimedia audio controller [0401]: Intel Corporation 82801BA/BAM AC'97 Audio Controller [8086:2445] (rev 02)
01:00.0 VGA compatible controller [0300]: Device [1ab8:4005]