Install Quicktime 7.3.1 in such a way that it overwrites the QT 7.4 files without interfering with your other system settings and third-party add-ons. This method is therefore longwinded and inconvenient, but will ultimately work.Ģ.

Unfortunately, this means you will lose some system settings and some or all third-party system add-ons. 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. Some things may be different in Leopard, but the principle should be the same.)įirst: Go to HD/Library/Packages and delete the file QuickTime740_Tiger.pkgġ. If you wish to downgrade Quicktime to 7.1.3, (even though you will lose the important security fixes contained in the 7.4 update, and you will also find that parts of iTunes 7.6 will not work without QT 7.4) there are two methods for doing this (note that attempting to manually delete Quicktime from your hard disk is doomed to failure, as QT has components all over the place as it is used by many applications): You can try the following to get back to QT 7.2, then use System Updater to get to 7.3.0 - if that comes up as a choice:

Quicktime download 7.3.1