Thanks guys. It's not a compatibility issue because I've been running QT 6.5.2 under Mac OS 10.2.8 (Jaguar) for a long time. I recently trashed some files that I thought were redundant and I suspect some key QT file may have been lost in the process. The Discussion lists indicate pretty clearly that if there is no uninstaller software, then QT cannot be removed. There appears to be no uninstaller/reinstaller option for my situation. Some techie may know of some unofficial "workaround". My only option does indeed appear to be re-installation of the system from the system discs (Mac OS 10.2.4). I wanted (obviously!) to avoid that which also implies later updating the system to 10.2.8 and also updating QT. I'd also probably have to update the iLife software, and there may well be other implications. Bob -- ************************************************************************ http://publish.uwo.ca/~mcdaniel/ _________________________________________________ For information concerning the MUGLO List just click on http://muglo.on.ca/Pages/joinus.html Our Archives can be viewed at //www.freelists.org/archives/muglo Don't forget to periodically check our web site at: http://muglo.on.ca/