Orion has announced Mac-compatible drivers for its StarShoot autoguider. An autoguider is a small camera that keeps a telescope pointed consistently on its target (for an explanation, see this post); it’s a must for long-exposure astrophotography. Most autoguiders on the market use the free program PHD Guiding. It’s available in a Macintosh version, but most inexpensive autoguiders have Windows-only drivers; those guiders with Mac drivers have tended to be much more expensive. So this is an interesting development: astrophotography has been one of the few niches where the Mac platform remains at a comparative disadvantage versus Windows.