That makes two of us ! for gettting the CD with music into iTunes on a MacBook Pro that doesn't have a CD slot, you' have to use a computer with a CD slot and a thumb drive. Put the CD in the drive, it'll show up on the right hand side of your computer's screen, then plug in the thumb drive. Double click on the CD to open it and there you'll see a few music tracks. double click on the thumb drive to open it, and now drag the tracks you want from the open CD to the open thumb drive. You should see a sign that says "Now Copying". when it is done you should see a number of music tracks on the thumb drive. You can now close the CD (or eject it) and then eject the thumb driver properly by dragging it to the Trash. Do Not just pull it out of the socket it's plugged into, just eject it, and when it disappears from your screen then you can unplug it and plug it into your 2014 MacBook Pro. You need to also find your old iTunes library on your newer MacBook Pro. ( I got this from Apple)/./// Quit iTunes...Go to the iTunes folder that contains the iTunes library files. from the menu bar at the top of your scrren choose go>Home, open the Music folder, then open the iTunes folder. Drag the iTunes Libary itl file to your Desktop. in the iTunes folder, open the Previous iTunes Libraries folder. Find the file named iTunes Library XXXX-YYY-ZZ where XXXX-YYY-ZZ is the date you updated iTunes. Copy this file to the iTunes folder (the enclosing folder), Rename it iTunes Library, and open iTunes. you should now see your missing content. Please note: any changes you made, such as new added songs or new created playlists might be missing
good luck to you
John b