After a successful install on my 2008 Macbook and update installs the wifi just dropped off. Did some research and found that turning off wifi management might help. After turning off wifi management all of the icons at the top of the screen disapeared. I turned wifi management back on so I'm back to square one again. I decided to try something else. Used my cell as a wifi hotspot keeping it right next to the laptop. Success! Is the problem a driver issue that causes the hardware to detect the signal as weak and is there a workable solution? In the meantime I'll just use my access point to connect to the web.