QuickTime 7.4 vs Mac OS 10.3 (Panther)

[Greg Kmethy]

A word of warning:

ArchiCAD 10 will not launch on Mac OS X 10.3 if the latest QuickTime 7.4 update is installed. This problem is specific only to ArchiCAD 10 and only on Mac OSX 10.3.

We recommend not to install the QuickTime 7.4 update. If you already did, here are the steps to remove it:
http://archicadwiki.com/Bugs/QuickTime_7.4_vs_MacOS_10.3

Greg