iMovie HD 6 is available free of charge to, according to Apple, “all users who have purchased and installed iLife ’08.” The iMovie HD 6 download is 154.6 MB in size and can be done directly from www.apple.com/support/downloads/imovieHD6.html.
The reason that has prompted Apple to make this move seems to be that users of iMovie ’08 miss many of the functions of the previous version and that now they are not present in the new one, such as the absence of support for plugins, no there are issues, missing support for multiple audio tracks and that the timeline cannot be seen. Although iMovie ’08 offers substantial improvements and new features.
Update without losing the previous version
If you are already an iMovie HD 6 user and you install iMovie ’08, you will have both versions of iMovie on your computer, since installing iMovie ’08 does not delete the previous version but is stored in a folder with the name “iMovie (version” n above) “.
The minimum requirements for its correct operation are: G4 processor or higher (including Intel), 256 MB of RAM, Mac OS X v10.3.9 or higher versions. If you want to make use of some of the included effects and high definition editing, the minimum requirements are higher.