cd problem solved (mac)

This book is excellent, the cd also.

Like others, I have struggled to download it from my mac. The CD was dimmed, inaccessible from the Finder windows.

The problem is solved as well: it was enough to go to the menu Finder / Preferences, then check:
Show these items on the desktop: CDs, DVDs, and iPods. The CD then appeared on the desktop, and this time it was accessed.
It was possible to copy audio tracks on the HDD.

Note that iTunes could not directly access the cd, I do not know why. However, opening the slopes from the desktop with "Open With" and then select iTunes from, everything was imported.
I do not know if those concerns come from my mac or cd, but I hope that manipulation may be used for other ...