Apple topped all computer companies posting over 30 per cent year-over-year growth rate in its Macintosh market share. According to two market research firms, Apple's computer market share has surpassed five per cent.

"Apple had a very good quarter with shipments increasing more than 30 per cent in all regions except Japan," said analysts for IDC in their report. "The growth is an excellent sign of the success of Apple's transition to Intel based systems."

According to IDC's report, the growth puts Apple's market share at 5.8 per cent (fourth place overall), ahead of Toshiba at 4.2 percent. Dell topped the US market with 31 per cent, but suffered a negative growth rate of -6.7 percent. The top five is rounded out by HP with a 22 per cent share and Gateway with a six per cent share.

"In the US market, the focus continues to be on the transition from desktops to notebooks, with notebook growth being the sole bright spot while desktop shipments continued to decline," said Bob O'Donnell, vice president, Clients and Displays at IDC.

Reporting a $546 million profit on Wednesday, Apple also said that it shipped over 1.6 million Macs representing over 30 per cent growth from the year-ago quarter. According to Apple CFO Peter Oppenheimer, this represents the strongest quarter in the company's history.

Market research firm Gartner showed similar numbers for Apple. (Due to differences in how the firms calculate PC shipments, the market share numbers do vary slightly).

Gartner has Apple's market share at 6.1 per cent with a 31 per cent growth rate year-over-year for the third quarter. The growth rate, according to Gartner, tops all other computer makers and puts Apple in fourth place overall for market share.

Topping Gartner's list of market share is Dell (32.1 per cent with -7.1 percent growth); HP (23 per cent and 6.3 per cent growth); Gateway (6.4 per cent with -1.1 per cent growth); Apple (6.1 per cent and 31 per cent growth); and Toshiba (5.1 per cent with 22.3 per cent growth).