I got some 10.5 disks advertised as Full Retail and having black disk with silver cross. Disks arrived, in a black hologram box. One disk is black with silver X marked 10.5.6 but the other two are grey install disks for macbook. One of the grey disks is marked Mac OS X install disk 1. Version 10.4.6 The other is marked Install disk 2. Version 1.0 Have I been duped? I was hoping to install this on an iMac G4 17" 1.25ghz flowerpot.