Enter your username and password into the prompt that appears and click Unlock.ģ. Then, click Click the lock to make changes.Ģ. Go to the Apple Menu (upper left of your screen), choose System Preferences, click Security & Privacy, and select the General tab. Your security preferences allow installation of only apps from the App Store and identified developers."įollow these steps to allow installation of unidentified developer programs:ġ. "'PDF Reader Pro' can't be opened because it is from an unidentified developer. While the PDF loads into Preview instead of Safari, this trick also has the advantage of downloading the PDF file from Safari to the Mac locally, which you might be looking to do anyway.ĭid this work for you to access the PDF file despite the Blocked Plug-in message in Safari? Do you use another approach, or did you find another solution to resolving the Blocked Plug-in message? Let us know in the comments.By default, Mac OS 10.9 only allows users to install applications from verified sources. In effect, most attempts to install software from the internet or physical media will show this error message: Now you have loaded the PDF, without using Safari, and bypassing the plug-in blocked message. Locate the PDF file and double-click on it to open it directly into Preview.
Navigate to the “Downloads” folder in the Mac Finder or by opening it through the Dock.Right-click on the link to the PDF then choose “Download Linked File” (or “Download Linked File As…”.Hit the Back button in Safari to find the preceding link to the PDF file.Loading a PDF on Mac Despite the “Blocked Plug-in” Safari ErrorĪll you need to do is download the PDF file locally to your Mac, then open it in Preview instead of Safari.
This is a bit of a workaround for loading a PDF file despite the “Blocked Plug-in” Safari message, but it works, and you’ll have access to the PDF. Perhaps it’s just a bug, or an overzealous security measure, but if you find the “Blocked Plug-in” message in Safari on the Mac when attempting to load a PDF, and you need to have access to that PDF, here’s one way to get around the error message and open the PDF file. While sometimes this can relate to having the Adobe Acrobat plugin installed on the Mac, it can also be an issue with Safari and loading some PDF files in general.
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