Detroit Iron Information Systems CD are single year specific 1964 through 1972.
While this may not be applicable to older MAC operating systems, it is applicable to my OS X Yosemite 10.10.3.
When inserting a disc into a CDROM and double-clicking the CDROM icon on the desktop you may see something like this.
My version of OS X (at least on my MAC Mini) does not support the DetroitIron.app application and will get this message when the .app icon is selected:
There is a workaround if your MAC does not support PC emulation. Click the OK button to close this message.
Double-click the Documents folder on the CD and you should see a screen similar to this (year and manuals may be different).
Note there are 4 folders. This happens to be for a 1971 Chevrolet CD so your year will be shown for those three. All year's CDs will show the Chevrolet Parts 1964 folder.
When you expand any of these 4 folders you will see numerous .PDF files that can be opened with Apple's Preview program.
So, while MAC user's don't enjoy a menu-driven CD like Windows-based PCs do, the files are there and available.
Optionally you can copy all the files in the Documents folder on the CD to your local hard drive.