Lost personal music collection on iMAC desktop
In a nutshell: I can no longer access my personal CD music collection, originally uploaded on a 2010 iMAC Desktop with now obsolete disc drive. Was the music only on my computer or was it picked up in the cloud storage? If so, where is it? It isn't in my Apple purchased music on my MacBook Air.
Further Background: iTunes had a share feature at the time, that allowed another user to access the music, but only one of us could play the music at a time. When my sharer's computer crashed, he had access to the collection, and I did not. The music collection was lost to both of us at that time. All that remained was music purchased from iTunes.
iMac 21.5″, macOS 10.13