In a note to clients -- as reported by "AppleInsider" (www.appleinsider.com) -- Needham & Company analyst Charlie Wolf says Apple's success in the enterprise is the "big story" in regards to Mac sales in the September quarter. With computer sales to U.S. businesses declining 13.3% year-over-year, Apple had a 62.7 percentage point difference.

The Mac's unit share of the U.S. business market was 9.35in the September quarter. That's up from 5.9% of total sales in June, and 5.4% in September 2011, says Wolf.

Apple had an even bigger share of revenue of computer sales to U.S. businesses, accounting for 17.4 percent. That was also up from an 11.5% share in June, and 10.7% share a year before, notes "AppleInsider."