Speaking to Macworld at IDF, Transitive, the company that developed the technology that underlies Apple's Rosetta software, has defended the fact that certain key Mac applications, such as Adobe Photoshop do not run at the speeds some had hoped for.

While all of Apple's new Intel-based Macs break speed records when running native applications, they tend to stumble over the applications that are yet to be offered in Universal binaries, for example, Adobe Photoshop.

In recent tests with the latest Mac mini it was found that a scene in Cinema 4D on the Core Duo Mac mini was rendered in one-third of the time it took the previous high-end mini.

Photoshop and Cinema 4D are the types of applications that are bread and butter for traditional Mac users.

While he was unable to talk specifically about Rosetta and the Mac, Transitive CEO Bob Wiederhold said: "If you use performance intensive applications, or if you are a professional user and you are going to use certain applications in a way that is computationally intensive, you will see some loss in performance. But we think that that's a relatively small percentage of the users, and a small percentage of the applications. For the vast majority of users, we think that Quick Transit delivers more than sufficient performance."