This Solution provides compatibility information for Big Business and OS X 10.11 El Capitan, the Mac OS upgrade being released September 30, 2015. (6567)
Big Business 10 is certified compatible with El Capitan.
Big Business 9 is certified compatibile with OS X Mavericks. Big Business 9 is not supported on El Capitan. Do not run Big Business Server 9 on El Capitan (it has memory issues).
Big Business 8 is certified compatible with OS X Mountain Lion. Big Business 8 is not supported on El Capitan.