The change was pretty much evident if one took a look at pictures of WWDC banners from 2006 and 2007

and compared them to the new 2008 ones featuring both the Mac and iPhone operating systems

This was clearly done to unify the branding since the OS was now running on a wide gamut of devices that included not only desktops and portables but also mobiles and the Apple TV set-top.

The change was also evident in a press release in May referring to the Developers’ Conference.

Altough the title “Apple Executives to Showcase Mac OS X Leopard and OS X iPhone Development Platforms at WWDC 2008 Keynote” still featured a distinction in the following text one could read

This year’s WWDC will showcase two revolutionary development platforms, the ground-breaking innovations of OS X Leopard® and OS X iPhone™, the world’s most advanced mobile operating system.

and also

WWDC 2008 will offer over 150 information-rich sessions and labs where Apple engineers will go in-depth on the innovative technologies that power OS X iPhone and OS X Leopard.

On the other hand the footer stating that:

Today, Apple continues to lead the industry in innovation with its award-winning computers, OS X operating system and iLife and professional applications.

had been already Mac-less at least since the 7th July of 2004.

While in 2007 the number of active users of Apple’s operating system was at 25 millions in 2009 it had suddenly risen to 75 million. How could this be?

The secret to Apple’s tripling its active user base in the past two years is the runaway success of the iPhone platform. During the keynote presentation Schiller produced a chart showing the number of actual active OS X users, not just of Mac OS X users. It’s very important to strike the difference between those two terms: OS X and Mac OS X.

The growth isn’t just about Macs but it ows a lot to the many iPhones and iPod touchs sold so far, to be exact around 40 millions of the devices. Both have a version of the former Mac OS X and of its technologies and have thus incremented the market share of Apple’s operating system and key programs such as the web browser Safari.