On previous versions of Safari, I have been able to auto download PDF files by using the following code in Terminal:

defaults write com.apple.Safari WebKitOmitPDFSupport -bool YES

When I got a new MacBook Air running Safari 12, this option no longer works. Does anyone know of a solution while still using Safari. I run a lot of reports that I need to download and not just view.

1 Answer 1


The Acrobat/Reader plug-in for Apple Safari is based on Netscape Plug-In API (NPAPI), which is supported only till Safari version 11. In Safari 12, support for NPAPI plug-ins is removed, and hence the current Acrobat/Reader plug-in will not work. For detailed information, please refer to help articles Display PDF in browser Adobe Acrobat, Acrobat Reader

What’s New in Safari - Apple Developer

Source: Adobe.com

  • If they removed it, why when I upgraded in my MacBook Pro does it still work? Sep 3, 2019 at 18:32

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