MFA-Duo - Duo Prompt Display Issues on iOS and Mac OS

Mac OS and iOS have content restrictions that may cause issues with the way the Duo Prompt renders - it will typically show a grey box with no options instead of the Duo Prompt.

Duo grey box error on the UW-Madison NetID login page, on an iPhone.

Note: This information can be found at

iOS 12 or Newer

  1. Navigate to Settings > Screen Time > Content & Privacy Restrictions > Content Restrictions > Web Content.

  2. Uncheck Limit Adult Websites to completely disable content restrictions.

    Note: If you do not want to fully disable restrictions, you can add at the bottom of the "Allowed Websites Only" list.

iOS 11 or Older

  1. Go to Settings > General > Restrictions > Websites.

  2. Uncheck Limit Adult Content to disable all content restrictions.

Mac OS 10.15 (Catalina) or Newer

  1. Open System Preferences.

  2. Navigate to Screen Time > Preferences > Content & Privacy.

  3. Set any Web Content restrictions to Unrestricted Access.

    Note: If you do not want to fully disable content restrictions, you can add in the "Customize" section of the "Allowed Websites Only" option.

Keywordscontent adult restriction block settings box blank missing iphone safari does not fit cant can't see authentication push enter passcode tablet ipad iphone not showing   Doc ID98163
OwnerMST Support .GroupIdentity and Access Management
Created2020-02-21 11:56 CSTUpdated2022-09-14 14:25 CST
SitesDoIT Help Desk, Identity and Access Management
Feedback  7   0