Currently Being ModeratedJul 2, 2012 6:22 AM (in response to Essexman)
If you plug in your Airport express to the airport extreme via a cable and then run the airport utility function the wizard should recognize the express. In the upper left it notifies you of an additional base station and you connect to it.
Currently Being ModeratedJul 2, 2012 6:36 AM (in response to gopalice)
Thanks, I want to setup wirelessly. in the instructions, item 7 says "Select the “Allow this network to be extended” checkbox" - but this does not exist in Airport utility. I'm confused.
Currently Being ModeratedJul 2, 2012 6:49 AM (in response to Essexman)
If you want to use the instructions that you have, they track with AirPort Utility 5.6 for Mac OS X Lion
Download and install this version. Then keep both AirPort Utility 5.6 and 6.0 on your Mac.
Currently Being ModeratedAug 2, 2012 4:58 AM (in response to Bob Timmons)
Just tried intalling 5.6 on Mountain Lion... the installe tells me I have an "Unsupported OS" when I got to the target disk selection. So this workaround may or maynot work any more. (Pending other people's experience.)
Currently Being ModeratedAug 2, 2012 6:12 AM (in response to Essexman)
I setup my new, 2012 Airport Express as a wireless extension of my 4th gen. Airport Extreme using Lion and the 6.0 version of the Airport utility. IIRC, all I did was plugin the express to the power socket and after a short wait it appeared in the airport utility. The dialog asked if I wanted to extend my network, I said yes and possibly with an entry of a password it was up and running. Worked ever since.