yes archicad 10 can open files to 4.1 but the libraries have only been updated since v6.5 WITH MISSING & DUPLICATE PARTS & MATERIALS FILL & LINEWEIGHT ISSUES - many early details in MSA detailer (which was sold as the greatest thing since sliced bread by GS) seem orphaned without major efforts - the whole ArchiCAD library reliance seems a growing ACHILLES HEEL & because of the lack of GS updates to such objects & WIBU protection which FORCES the need for a legacy machine just to go back into older versions which don't run properly in emulation because of the WIBU - the only software I can't run is the most expensive applications I supported. I have given up on relying on GS for backward support - hardware & speed can be relatively easily changed but the real issue would seem file access. That said, the Powerbooks are stuck with really old G4 processors and I noticed ArchiCAD 11 on my Powerbook is a bit over its capabilities for any real work, so it would probably have been a more theoritical issue than a practical one. If they had made the PPC version indeed a true 'universal binary' (it would probably be very large) the PPC might have survived and being compiled with the free Apple XCode instead of the retired CodeWarrior compiler.

And with three different compilers (Visual Studio, CodeWarrior, XCode), I understand putting only effort in the newer systems. I think that is indeed the reason: there are not two but three versions: Windows, PPC and Mactel. I'm assuming this has to do with the amount of legacy code to be converted into the more modern programming system. They are not using the Apple Universal Binary, that would be able to run on both PPC and Intel machines. I think part of the problem is that GS is developing separate PPC and Intel versions.

Quicktime os x 10.3.9