Even as Apple moved to firm up its already full-featured operating system, it looked to build upon the platform by unveiling tools for iPhone application development. The iPhone runs on a scaled-down version of OS X, making it easier for developers to create apps for the phone and do more with apps for the operating system. The iPhone software developer's kit, due out in June and based on Apple's existing Mac SDK, effectively extends the reach of existing tools to allow for a seamless development platform.

With the tools in place, building an application for one Apple system adds knowledge and experience that can be transferred to apps built for another Apple platform. For developers, this means they can create powerful, functional and stable applications quickly, without the need for teams of coders or support squads. For end users, the result is a wider variety of applications and functions, no matter which Apple product you're using.

Is the upgrade worth it?

Six months after its release, debates about whether Leopard is a worthy upgrade have largely vanished. Even large companies are checking it out, uncertain as they are about the future of Vista; for example, IBM is running a test to determine whether Macs in the office would be a smart move. A recent survey by ChangeWave Research found that "Apple continues to set the standard for corporate customer satisfaction." That's noteworthy, given the lack of a specific Apple push into the enterprise.

What's more, the OS x86 project is looking for ways to install Mac OS X on non-Apple hardware. And just last month, US-based PsyStar Corp popped up to offer Mac clones. It may not be legal, and Apple will no doubt have a few things to say about the venture, but it shows the energy and enthusiasm of those who have used the Mac OS, and is a sure sign of Apple's continuously extending reach.

With Intel chips inside and Boot Camp installed, Macs can now run Windows, meaning no one is necessarily bound to a single operating system. If you are still on the fence about switching but are a fan of Apple hardware, buying a Mac is win-win. Even if you find that Leopard and all of its features don't suit your fancy, you can easily back up your data, reformat your Mac and install any operating system you desire, be it Windows or a Linux distribution. Because Apple generally chooses higher-end components for its Intel-based computers, most current operating systems should work fine.

Though Apple's hardware is what so often draws a crowd -- remember when the iPhone and MacBook Air came out? -- that hardware is just a collection of parts. Leopard is the heart and soul of the Mac.