I found my old one in the basement and had to reset it since I changed my router about a year ago. I still have an older Mac Mini PowerPC running Airport Utility 5.6.1 and that version can run the setup for the original AE. I use mine only for AirPlay so I have it set up to join an existing network and there was no problem with that. It does have WPA2 security so no issues there but it is a slower device as it has the b/g spec. It seems to work fine for AirPlay but if you have other needs, you'll have to see such as extending a network etc. It might slow down your network if used that way as I recall.