Safari 6.1 on MacOS 10.8.5 not play quicktime movies
Trying to view quicktime movies in Safari brings up the Quicktime Q graphic with a big question mark. Safari->Help-> Installed Plug-Ins includes:
QuickTime Plug-in 7.7.1
The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site. — from file “QuickTime Plugin.plugin”.
in the list of plug ins and the /Library/Internet Plug-Ins folder does have the file "QuickTime Plugin.plugin".
I have tried downloading the older Quicktime Player 7.app and then rebooting the computer and I still cannot view the Quicktime movies in Safari. I can view the quicktime movies in Firefox (version 24.0).
I have also deleted the items in the Library folder:
Caches/com.apple.Safari/Cache.db
Preferences/com.apple.quicktime.plugin.preferences.plist
Preferences/QuickTime Preferences
rebooting and relaunching Safari all with negative results.
All of these have been suggested by people in previous postings dating back to Fall 2012 or earlier, so I'm out of ideas.
Is there anything else I should try?
Running Safari 6.1 on Mac OS 10.8.5 on a MacBook Pro with Retina display.
MacBook Pro with Retina display, OS X Mountain Lion (10.8.5)