Disc C installation problem

Hey I'm installing Kontakt 3, currently on my last disc (Disc E) and it is almost finished, however while going through the full installation with all the discs.. "Library Disc C: Orchestral 2" did not work...I'm on a mac..and the red highlighted/outlined exclamation mark came up telling me I needed to put the main installation in...so I ended up starting all over from the beggining, then when I got back to Disc C the 2nd time it just skipped it and the message came up telling me to insert "Disc D" where it you either press okay once the said disc is loaded or you press cancel...so I just continued and now I am on E and the installation is almost complete, but I bought Kontakt 3 so I could have access to ALL of the library...not most of the library