Getting InterfaceBuilder 2.5 to run on Leopard
You need to copy a few things over from your working Tiger installation. With all these in place Interface Builder 2.5 starts nicely and doesn't complain. I haven't tested it more.
From /System/Library/Frameworks (Tiger) to /Library/Frameworks (Leopard) a different target directory!
From /System/Library/PrivateFrameworks (Tiger) to /Library/Frameworks (Leopard) a different target directory!
From /Library/Application Support/Apple/Developer Tools (Tiger) to /Library/Application Support/Apple/Developer Tools (Leopard)
- IB Templates
From /Developer (Tiger) to /Developer (Leopard)
- IB Plugins if available
From /Developer/Extras (Tiger) to /Developer/Extras (Leopard)