Adobe has shifted over half a million downloads of its Photoshop CS3 beta, the company has confirmed.

This news has been confirmed on Adobe's John Nack's blog. It confirms the level of pent-up demand among Mac users as they await the final release of a version of Photoshop for Intel Macs.

Adobe will formally introduce Creative Suite 3 at an event on 27 March, the even will be webcast globally. The software is expected to ship "in spring", the company has said.

This release of Photoshop will also see two versions of the software make their debut, Photoshop CS3 will be joined by Photoshop CS3 Extended, a new edition that aims to stretch the limits of digital imaging.

Photoshop CS3 Extended includes everything in Photoshop CS3 plus a new set of capabilities for the integration of 3D and motion graphics, image measurement and analysis. Photoshop CS3 Extended is also being aimed at professionals in architecture, engineering and other advanced imaging fields.