I then opened the QuickTime system preference, went to the Browser tab. "What I ended up doing was, emptying the cache in Safari, then quitting Safari. I the instance of one movie I created, and streaming from a clients website, the movie was playing then stopping at the poster frame and not continuing." A movie would begin then just freeze at a particular frame. One reader writes: "I just started having issues with Quicktime 7.4 as did a few of my clients. QuickTime content not playing in Safari Users continue to experience problems playing QuickTime content in Safari. But I removed the QuickTime Plugin.webplugin from the internet plugins folder and that has solved my problem" "As well, I wasn't able to get Quicktime video playback after the 7.4 upgrade. Removing QuickTime Plugin.webplugin Removing the file /Library/Plug-ins/QuickTime Plugin.webplugin continues to prove succesful for resolving these issues.
Published fixes aren't proving effective"
"Quicktime 7.4 breaks playback of streaming video (plays audio only) eg in. Downloaded several MP4 files and got sound only" "I have QT Pro and just installed QT 7.4 (92) to MacOS X 10.4.11. I tried downloading QuickTime 7.4 and reinstalling, repairing permissions, removing ~/Library/Preferences/.ist [Ed.- One of MacFixIt's recommended fixes etc. "Sorry that I updated to QuickTime 7.4 - I can no longer play MP4 videos with QuickTime Pro. No video, only audio One of the most pervasive problems with QuickTime 7.4 is one in which movies play audio but no video. With the package open, select its name (the top entry in Pacifist), click "Install" and follow the on-screen prompts, making sure the "Use Administrator Privileges" box is checked. Follow the on-screen instructions, and after accepting the license agreement, click "Options." Select "Archive and Install," and check the "Preserve User and Network Settings" option if you'd like to do so.Īfter the installation process is complete, you will be left with an earlier Mac OS X system that (hopefully) does not suffer from the problems generated by QuickTime 7.4.ĭrag the QuickTime 7.3.1 package onto the Pacifist icon, or choose "Open Package" from the File menu in Pacifist and select the QuickTime pacakge. Restart your machine and hold down the "C" key to boot from the newly inserted disc. To begin the process, insert your Mac OS X CD or DVD. Unfortunately, this means you will lose some system settings and some or all third-party system add-ons. Next, you'll need to perform an Archive and Install process to remove all of the QuickTime update's (and potentially problem-causing) components, and replace them with the components of the older release. 
If there is an issue along the way, your valuable data will be safely intact in its current form. First, make a backup of your current Mac OS X installation with QuickTime 7.4 applied, problematic as it may be.
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