I just updated the OS on my iMac (late 2009) to OS X Mavericks and now the Wi-Fi network that I had previously set up and used for internet access for my iPad mini and my Nintendo Wii U will not work. It worked fine before with Snow Leopard.
iMac, OS X Mavericks (10.9.1)
Begin by restarting the computer, if that does not help then do 2-3 SMC and PRAM resets (instructions below) and if those do not work reset your modem and router (I don't care if other devices work) and ensure the Router is has the most up-to-date firmware installed.
I contacted Apple Support via online chat and a nice dude named Anthony helped me to fix the problem. I had to reset the Internet sharing by unchecking it and clicking to re-select it again. Also had to set a new location under Wi-Fi settings and re-enter the password for the network.
Great, glad you guys figured it out.
Yeah, me too! It was frustrating and I was considering uninstalling Mavericks and going back to Snow Leopard!
Thanks for trying to help btw!
How come my Wi-Fi network will not work after I updated my iMac to OS X Mavericks?
