"Unsupported Plug-in" in Safari

Question

Level 1

10 points

"Unsupported Plug-in" in Safari

My Safari browser running Mac OS Catalina says "Unsupported Plug-in" for two videos I have inserted on my website. The videos are .m4v files. Any ideas? Thanks.

MacBook

Posted on May 20, 2020 1:48 AM

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Answer 1

microg Author

Level 1

10 points

May 20, 2020 6:23 PM in response to Eric Root

Thanks again. I looked and found this:

"Safari supports the plug-in for Adobe Flash Player but no longer supports other plug-ins. The Plug-ins setting appears only if you have the Adobe Flash Player installed."

Why would Apple stop supporting the Quicktime plug-in when it is one of its own products???

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Answer 2

Eric Root

Level 10

685,305 points

May 20, 2020 5:51 PM in response to microg

Can you try to play the files outside of accessing them on your website? That may indicate if it is a web site problem or a Safari problem.

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Answer 3

i_rina

Community Specialist

May 20, 2020 2:08 PM in response to microg

Hello and welcome to Apple Support Communities, microg!

I understand you're seeing the alert indicating that you have an unsupported plugin. I'd be happy to provide information to help you address this.

Check to see if these plugins have any updates from the developer site. It's also possible that these plugins are no longer supported in newer versions of Safari, and you would need to remove them: How to install Safari extensions on your Mac

"How to turn off or uninstall extensions

Choose Safari > Preferences, then click Extensions.

To turn off an extension, deselect its checkbox.
To uninstall an extension, select the extension and click the Uninstall button. If you can't determine what an extension does, or you don't expect to use it again, you should uninstall it."

Have a great day!

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Answer 4

microg Author

Level 1

10 points

May 20, 2020 4:07 PM in response to i_rina

Thank you for the feedback! But I should have been more clear. The unsupported plug-in is for Quicktime in Mac OS Catalina. Safari won't play the .m4v videos on my website. And in the Safari extensions, I don't see Quicktime.

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Answer 5

microg Author

Level 1

10 points

May 20, 2020 5:54 PM in response to Eric Root

Thanks, Eric. Both Quicktime videos play on my older iMac computer and on my PC. But my new MacBook Pro (running Catalina) gives me the "Unsupported Plug-in" problem, with no placeholders or extensions.

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