This is Sibelius v6 for MaC and Windows.

Sibelius 6 is a giant leap forward in notation software with amazing new features and improvements for educators, students, composers, arrangers, copyists and musicians of all kinds. No more tidying up scores.

Only in Sibelius:

Magnetic Layout takes care of almost every detail of score layout for you - so effortlessly, hardly notice. As you write, it gives everything just the right amount of space and avoids collisions ? producing beautiful results. This one feature saves you up to half your writing time.

Track changes and compare versions

Only in Sibelius:

Have you ever written something better the first time around?
Versions keeps track of revisions to your, lets you look back at earlier versions of it, and see what changes were made since. Collaboration becomes a joy, and you can even add sticky Comments to leave notes for yourself, or others.

Conduct your scores

It?s time to take to the podium! Live Tempo lets you conduct the playback of your score to produce a nuanced, musical performance. Simply tap a key on your computer keyboard, MIDI keyboard or foot pedal, and Sibelius follows your beat.

Great new sounds in no time

High-quality playback now needs no set-up at all, just hit the space bar, and Sibelius plays back using amazing sampled sounds. High-quality playback is more seamlessly integrated than ever, thanks to the latest technology from Digidesign?s AIR team.