Disable Adobe Acrobat Plugin in Safari. There have been several security bugs in Adobe Acrobat in the past. Safari can view PDFs too.
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.
How to fix it
macOS 10.11 – 11.0
- Open “Safari” > “Preferences”
- 10.12-: Click the Websites button, then Internet Plug-ins: Website Settings.
- 10.11: Click “Security” > “Plugin-Settings…”
- Deselect “Acrobat Reader”
Keep in mind: not every security and privacy setting is suitable for everyone. Enhancing the security can lead in losing functionality and/or comfort.
Before making changes, please backup your Mac! Do not make too many change at once. After changing your Mac, check if your normal usage of your Mac has changed in a way which fits to you. Are your really willing to loose some functionality and/or comfort?
Most important is, that you learn and understand what are the advantages and disadvantages of the security settings and that you are aware about the capabilities and risks of your Mac configuration.
To skip this result message from your next security scan, you can deactivate this check. FAQ: How to deactivate a check.
CHECK RESULTS BY SIMPLEUMCHECK DO NOT COVER ALL ASPECTS OF POSSIBLE SECURITY CHECKS OR MAYBE INCORRECT OR INCOMPLETE. THE RESULTS ARE ONLY CLUES FOR RECOMMENDATIONS TO IMPROVE SECURITY AND PRIVACY ON THE MAC.
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