Speedmark is Macworld Lab's standard test tool for benchmarking new and upgraded systems running Mac OS X. It uses real-world applications and everyday tasks. It is a general-purpose suite that includes tasks everyone from a high-end user to a new user performs every day.

Macworld Lab follows a detailed script to perform the 17 tasks. Each task is performed three times. We compare the results to a 2.13GHz MacBook with 2GB RAM (Mid 2009), which is assigned a score of 100. We then take the geometric mean of the normalized scores.

Apple's latest Mac OS X operating system, 10.6, focuses more on refinements rather than features. But the new OS does boast some new technologies meant to help your Intel Mac take better advantage of its central and graphics processing units. Unfortunately, in order to make these refinements and improvements, Apple made the decision to pull the plug on Power-PC equipped Macs, offering no support for any pre-Intel hardware.

The Macworld Lab has been hard at work tweaking Speedmark, our overall system performance testing tool, to better accommodate Snow Leopard and to test the Macs on which it runs. Of course, that means that the new version, Speedmark 6, runs on Snow Leopard and supports only Intel-powered Macs.

We have Speedmark 6 scores for 19 Intel Macs, including the new MacBook, iMacs, and Mac minis released last month. Please note that because Speedmark 6 uses different tests and a different OS, Speedmark 6 scores can't be compared to the scores of Speedmark 5, the previous version of our test tool.