Disable Flash Plugin in Safari if installed
Adobe Flash has caused many problems in the past, with critical vulnerabilities frequently being exposed and Adobe regularly being required to release security updates.
The Flash 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 Flash plug-in will not work.
How to fix it
macOS 10.11 – 11.0
- Select Safari and click Preferences.
- 10.12-: Click the Websites button, then Internet Plug-ins: Website Settings.
- 10.11: Click “Security” > “Plugin-Settings…”
- Deselect Adobe Flash Player.
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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.
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