I hit this message box that says: Required softare extensions are missing. Click the 'OK' button, and you will be transferred to the PACE web site where an installer can be downloaded. Item: IntCLv.app When I hit item 127 on the Nikon Installer, it takes me to this window. Also, I can't even click on the window! The system I have is this: Mac Mini 1.67 2gb Ram OS Tiger 10.4.6 I am disillusioned by Nikon Software and not because of this installer. Nikon View and Editor have excellent image results, but the software is slow. I went from a 667mhz powerbook to the 1.5 gh mini without any change is speed performance for the programs. My brother has a beautiful Dual Athlon 2gb Alienware tower that runs the programs nicely, but they still feel bogged down!