We've noticed a big issue with Apple Mobile device where the captive portal can't be closed to authenticate with MFA. Even text messages won't come through due to the phone thinking it has wifi and trying to retrieve text that way. They bypass solution was to connect to the network > get the splash page > cancel sign in and choose "use without internet". > Then you can open a normal safari window and navigate to "captive.apple.com" and sign in normally. This utilized cookies and doesn't close if you switch windows. However thats very clunky. Aside from that, when we reached the end of our splash page timeout, apple mobile devices will no longer get the splash page to sign in. No amount of forgetting network or trying to manually load the captive page works. User shows not authorized in Meraki. We have a support ticket in for it.
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