How do I delete duplicate songs on my MacBook Pro?

See Duplicate songs in iTunes/Music - Apple Community. What view are you using? You should normally be able to select songs, if only to play them. Ctrl/right clicking should give a list of available commands.

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"How do I delete duplicate songs on my MacBook Pro?: Best way to delete duplicate songs on my macbook pro, It will not let me highlight song to delete"

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Finding/Deleting Duplicate Music:

To delete, you need to find the duplicates, first. Find out how to do so here: Find Duplicate Items in Music on Mac - Apple Support