Old CD's
I have a new i mac and would like to listen to my old cd's and up load them to my i mac and play back my music on my computer and my i phone
iMac Pro
Fatnats,
If your new computer has a CD drive, or if you have an external CD drive, you can import the CDs to your iTunes/Music library. Follow the steps in here:
Import songs from CDs into Music on Mac - Apple Support
You mentioned that they are old. Make sure they have a clean surface before you begin the ripping process.