Put down the credit card. Turn away from the Apple Store. Of course you want to jump on the latest Apple bandwagon and upgrade to Mac OS X 10.5, better known as Leopard.
It has been almost two and a half years since its predecessor, Version 10.4 Tiger arrived, and the new operating system offers a slew of changes, including a revamped user interface, new apps, tweaks to older programs and numerous under-the-bonnet changes.
But that doesn't make it necessarily a good choice for some users, no matter how high their enthusiasm.
In fact, Apple has spelled out hardware requirements for Leopard that will leave some users of older computers in the dust - unless they opt for new hardware. That doesn't even include those who still use the "Classic" Mac OS, once known as Mac OS 9, or apps that haven't been updated yet to run in Leopard.
It also doesn't deal with the fact that some people are simply averse to change, wary of jumping on the introductory release of any operating system. Just ask all those companies patiently waiting for the first service pack for Windows Vista.
With that in mind, here's a quick look at some of the things to consider when deciding whether now is the best time to upgrade your Mac.