On Feb 26, 2009, at 9:33 AM, Neil Laubenthal wrote: > Just wondering before I install the beta . . . does it overwrite the > existing Safari 3.whatever it is in 10.5.6 or install alongside it > so that one can remove 4 and/or update it should that be necessary. > I'm reasonably sure that I don't want to install 4 beta 1 if the > only way to get rid of it is Time Machine myself back or do an > archive and install. The Safari 4 Beta comes as a disk image. This image includes 2 packages - the Safari 4 beta install and an Uninstall package. The Install package removes Safari 3 and replaces it with Safari 4. All your bookmarks, etc are retained. The Uninstall package removes Safari 4 and replaces it with Safari 3.x leaving you with what you originally started with. Quick and easy to revert without the need of using Time Machine.