Years before Mac OS X 10.0 was first released in 2001, Apple launched Mac OS X Server, targeting its newly acquired Unix-based operating system technology at the education and workgroup server market. Apple has struggled ever since to find a broad server strategy that works. The solution may be as obvious as the iPhone App Store.
Inside Mac OS X Snow Leopard Server: Apple's server strategy
Inside Mac OS X Snow Leopard Server: Apple's server strategy