Apple is offering an £18 discount on copies of its presentation package Keynote as an incentive to .Mac account holders.

The discount brings the price down to £57 including VAT.

Also on offer are seven free Keynote themes from third-party designers – worth £54, according to Apple.

The discount scheme will run until March 17 and joins other incentives such as a discount on VersionTracker Pro 3.0 software, due to expire on February 4.