Where is Quicktime software update?

"Where is Quicktime software update? : Quicktime will not open files created in QuickTime. Advised to update QuickTime software. Cannot find Quicktime update. Where is Quicktime software update? MacBook Pro."

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Fixing QuickTime Player:

A Reinstall may Work:

The app may be corrupt --not the files. So, by dragging QuickTime Player to the Trash from the Applications Menu, and then emptying the Trash, and, finally reinstalling the macOS, it will get installed.

Back Up, then Reinstall the macOS:

Nothing would be deleted. It's just that items that have become corrupted or deleted, would be replaced or reinstalled back to where they should be, respectively. Go Here: How to reinstall macOS from macOS Recovery - Apple Support

Important: Create a Time Machine Backup, First:

Prior to the re-installation of your macOS, be certain to backup your Mac using a Time Machine Backup. That way, you can have something to restore your Mac from, should anything go wrong with the reinstall. Use an external hard drive that is at least 1.5 the total storage capacity.

Software updates for it are bundled with the OS. If you don't want to or can't upgrade the OS, try using VLC.

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>So, by dragging QuickTime Player to the Trash from the ApplicationsMenu

The OS won't allow the QuickTime Player or other system components to be manually deleted.

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