Storing files in iCloud without a copy being saved on my Mac?
iCloud Drive is specifically to sync your data between machines, roughly similar to how Dropbox etc works.

Remove a file from one machine, it's gone from the others too.

'Documents &amp; Data' was deprecated &amp; is removed when you first convert your iCloud (Mavericks/iOS 7) storage to iCloud Drive.

Alternative suggestion [untested]

How about - as you don't mind having one copy locally, just not two, changing your iTunes Library location to a folder inside the iCloud hierarchy?

Move your actual 'Music' folder there &amp; just point iTunes to it