ZeroLines.zip (2.2 KB)
If you download and unzip this file, it will produce a folder called ZeroLines. In the Finder, use Go > Go To Folder to go to this location:
/Library/Application Support/Steinberg/
Inside there, create a folder called Dorico 5, then inside that folder create another called DefaultLibraryAdditions (note, no spaces in this folder name). Finally, drag the ZeroLines folder into the DefaultLibraryAdditions folder.
Now restart Dorico: you should find a zero-line instrument in the Sketch family in the instrument picker.