I have suddenly started getting prompts on my 2014 Mavericks MBP (10.9.5) every five minutes that bring up a page with HTML like the following:


At the bottom of this modal window is a url:


I am on my home network which uses an Airport Extreme running 7.6.4. I did not make any known configuration changes to either my computer or my network. Why am I suddenly seeing this page, which other posts suggest is a captive portal test?

I saw another question that demonstrated how to disable the Captive Network Assistant, but as I do take my computer to hotels that use these portals, I'm reluctant to jump straight to that. Instead, is there something on my Airport that is generating/blocking these all of a sudden and it shouldn't be? I tried a factory reset of the Airport and I'm still seeing this issue.

How can I configure my network so I stop getting these annoying popups?

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    Seems like the only common denominator is Mac OS 10.9.5 - only users in our office with 10.9.5 see it, haven't updated any other software. – Erwin Wessels Jul 15 '15 at 8:07
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    I noticed this just now too. I think apple broke something, that URL is returning the HTML as entity encoded ie "&lt;HTML&gt;&lt;HEAD&gt;&lt;TITLE&gt;Success&lt;/TITLE&gt;&lt;/HEAD&gt;&lt;BODY&gt;Success&lt;/BODY&gt;&lt;/HTML&gt;" This is broken on my friends' iPhone 4 running iOS 6.something, I got around the problem by turning off "auto-login" – Joel Pearson Jul 15 '15 at 9:38
  • I have raised a bug with apple (I have a developer account), with bug number: 21832176. Hopefully they fix it soon. – Joel Pearson Jul 15 '15 at 9:55
  • I have the same issue: OS X 10.9.5 . No update was installed by me. – sobolevn Jul 15 '15 at 10:45

The page has now been corrected, which should mean that the popup no longer occurs.

  • So there was an error on the test page that was causing this? – Troyen Jul 15 '15 at 18:30
  • Amazingly enough, that's my conclusion. Have to say, this seems like a rather unstable implementation, but hey, what do I know... I'm only a web dev! – Erwin Wessels Jul 16 '15 at 3:10
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    Yes, there was an error on the apple page, I finally got a response from Apple Developer Relations and they told me "Can you please verify and see if this issue still happening? We have changed something server side.". Obviously they fixed it a long time ago now. – Joel Pearson Aug 8 '15 at 1:18

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