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If features on a webpage don’t work in Safari on Mac
If features on a webpage don’t work, options that help Safari handle special content may be turned off.
- Make sure the webpage is open. 
- In the Safari app  on your Mac, choose Safari > Preferences, then click Security. on your Mac, choose Safari > Preferences, then click Security.
- Make sure the Enable JavaScript checkbox is selected. 
- Click Websites. 
- On the left, click Content Blockers. 
- Make sure Off is chosen in the pop-up menu next to the website. 
- On the left, click Pop-up Windows. 
- Make sure Allow is chosen in the pop-up menu next to the website. 
See alsoBlock pop-ups in Safari on Mac