Pixelmator is what a photo graphic editing app would look like if it is developed by Apple. One of the winner of the just announced Apple Design Award at WWDC 2011, Pixelmator is the Photoshop replacement for the common people.
Costing less than 1/10 of the price of Photoshop at $29.99, Pixelmator has the tools that meet the need of non-professional graphics editor. Version 2 of Pixelmator is coming this summer with vector supports, content-aware fill etc features, making it closer match to Photoshop. Version 2 will be a free upgrade but will cost more at $59.