"I'm quite pleased with the pace of new operating systems every 12 to 18 months for the foreseeable future", he said. "We've put out major releases on the average of one a year, and it's given us the ability to polish and polish and improve and improve."
This pace is far quicker than Microsoft's current release schedule. It was seven years between Windows XP and the release of Vista.
When asked about Leopard compared to Vista Mr. Jobs joked, "everybody gets the Ultimate edition and it sells for 129 bucks, and if you go on Amazon and look at the Ultimate edition of Vista, it sells for 250 bucks."