Here I am on High Sierra (10.13.6), trying to get into the Notation window.
When I try to open it, though, the dialog box appears: "Metro requires the 'Aloisen New' font to be installed in order to access standard music notation."
Fine and dandy, I have it ...wait, no. where'd it go? And I had trouble finding this specific font before, too...
No matter, I find it online, add it to FontExplorer, activate it, and ...Metro refuses to recognize it.
Fine, I'll just drop it into the system folder where ...it... refuses to go.
Open terminal, sudo cp [file] [destination], enter password... and "Operation not permitted."
Huh. What am I doing wrong? It couldn't be that nobody thought to use notation in Metro since High Sierra came out, right? Right?