PDFs don't load on the first attempt in Safari 7 and 6.1

On the first attempt to view a PDF on a new domain or website in Safari 6.1 and 7 (delivered with Mac OS X Mavericks 10.9), the browser window is gray or blank. It displays the alert: "Blocked Plug-in."

The latest versions of Safari use a new plug-in manager for enabling and disabling plug-ins on a global or per site basis. The Acrobat and Reader PDF viewer plug-ins are not trusted by default until you actively trust the plug-in globally, or for each website.

Solution: Trust the PDF plug-in

Trust the PDF plug-in globally

  1. Choose Safari > Preferences > Security > Manage Website Settings
  2. From the left panel, choose Adobe Reader or Adobe Acrobat.
  3. In the When visiting other websites pop-up menu, choose Allow Always
Security settings window

Trust the PDF plug-in on a per-site basis

For each domain or website on which the "Blocked Plug-in" message appears:

  1. Click the "Blocked" message.  
  2. When the Trust dialog appears, choose Trust.
When the Trust dialog appears, choose Trust

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