How do I transfer all music from an external hard drive to a new Mac using Apple Music?
transferring music from eternal hard drive to new Mac. not all songs appear if tracer again, just new songs
[Re-Titled by Moderator]
iMac 24″, macOS 15.2
See:
Move your iTunes library to a new computer - Apple Community
See also How to move your iTunes library to a new computer - Apple Support for Apple's approach to this topic.