Open .musicxml files on your Mac.
.musicxml
Sheet music exchanged between Sibelius, Dorico, MuseScore and Finale: parts, measures and notes.
Loper is a free, minimal editor for macOS that opens MusicXML score instantly and colors every part of the file, so you find the value you need at a glance and can fix it right there. No IDE, no project to load, no gray wall of text.

Show the file as text
<score-partwise version="4.0"> <part-list> <score-part id="P1"><part-name>Cello</part-name></score-part> </part-list> <part id="P1"> <measure number="1"> <attributes><divisions>1</divisions><time><beats>4</beats><beat-type>4</beat-type></time></attributes> <note><pitch><step>D</step><octave>3</octave></pitch><duration>2</duration><type>half</type></note> <note><pitch><step>A</step><octave>3</octave></pitch><duration>2</duration><type>half</type></note> </measure> </part></score-partwise>How to open .musicxml files
- Download Loper (free, Apple silicon, signed and notarized) and move it to Applications.
- Double-click your .musicxml file, drag it onto the Loper window, or right-click it and choose Open With › Loper.
- Want every .musicxml file to open in Loper? Choose Loper › Make Loper the Default Editor….