Thayer's Birds of North America version 7 for Mac includes 987 species and 6,500 color photos. In addition, there are over 1,500 songs, 550 videos, 700 quizzes, 987 range maps, an ID Wizard, side-by-side comparisons, sightings reports and much more. This USB Flash Drive installs on Mac computers running OSX 10.8 through OSX 10.11.