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Mbox 2 series, Digi 002/003 series) or M-Audio audio interface (e.g.
Axiom or Axiom Pro series, Oxygen series, Key Rig series etc.), please check compatibility information on the M-Audio and Avid sites before you install Mac OS X 10.6.
If the Mac is running OS X Mavericks, OS X Mountain Lion, or even Mac OS X Snow Leopard, you’ve got a tougher decision to make, mostly because you likely stayed on one of those earlier releases for a reason.
Will OS X El Capitan offer a meaningful improvement over what OS X Mavericks or prior offers?
Alternatively, you can click here to download the update » This update is recommended for all Sibelius 6 users, even if you are running Mac OS X 10.5 or earlier, or Windows.
Sibelius relies on third party device drivers for many aspects of operation, including screen display, MIDI and audio playback, printing, scanning, and so on.
This is because many Mac developers update their apps to take full advantage of new abilities offered in the latest versions of OS X, and often updated apps run smoother and fix bugs that were discovered.