A conditional settlement has been reached in the class-action lawsuit filed on behalf of G3 users by law firm King & Ferlauto, reports MacCentral.

The suit centred on claims that Apple failed to support certain G3 models with the same Mac OS X performance enjoyed by G4s.

The allegations concern an 1998 Apple press release in which it promised: "Mac OS X will… be fully optimized for Apple's PowerPC G3-based computers."

If approved by the courts, Apple must refund the cost of Mac OS X – up to US$129 – to those who return their CDs.

The agreement covers Bondi Blue and fruit-coloured tray-loading iMacs, as well as several generations of Power Mac G3s, older iBooks, and PowerBook G3s. It applies only to US end-users who purchased OS X on or before May 15, 2003.

A Apple Store $25 e-coupon is also to be offered to those G3 users whose ability to run certain graphics apps, games and DVDs was affected by OS X.

A spokesman for King & Ferlauto said: "I think this is a very good settlement. There's always going to be somebody who thinks the settlement's not fair or the attorney's fees are too much, but this gives people most of what they want."

In a statement issued to MacCentral Apple admitted no wrongdoing in its conditional acceptance of the settlement. "Apple has agreed to enter into this agreement to avoid the further expense, inconvenience, and distraction of burdensome and protracted litigation."