This update broke my network.
I still have internet on my iMac (through Ethernet) but can't connect to my Wi-Fi network on my MacBook/iPad/iPhone, even though I can see it. Also, my Time Capsule and Airport Express appear as missing in the Airport Utility.
Tried resetting my Time Capsule but it does nothing (it's "stuck" with a green light). Tried unplugging and plugging back in, the Airport Utility recognizes it for a little while, and then it goes missing again.
Anyone else experiencing this?
I also noted a speed decrease when the internet was working, severe problems with broken internet service intermittently, required factory reset of all Airports.
How do you roll back? Might come to that eventually if this problem rears its ugly head again.