Pixelmator Team の Mac OS X 専用画像処理ソフトの Pixelmator がアップデートしていました。Pixelmator 2.0.5 となります。このアップデートではパーフォマンスの改善と Intel GMA950 などのグラフィックチップに対応したようです。

Pixelmator 2.0.5 (Released on June 12, 2012)

Improvements

• Improved performance and stability for the following graphics cards:
Intel GMA 950, Intel GMA X3000, Intel GMA X3100, ATI Radeon HD 2600, and ATI Radeon X1600
• Adds the ability to turn off default document opening in PXM format by typing the following command in the Terminal:
defaults write com.pixelmatorteam.pixelmator alwaysUseNativeFormat -bool no

Other issues

• Resolves an issue that prevented using Pixelmator as an external editor in iPhoto and Aperture
• Addresses a problem that sometimes caused an inability to save or export files
• Addresses an issue that allowed images opened from the Photo Browser to be misplaced
• Fixes a problem that caused different file names to appear in the Save dialog
• Resolves an issue that caused brush strokes to perform incorrectly when using some brush presets
• Resolves an issue that caused the Transform constrain proportion option to work incorrectly
• Fixes an issue that caused incorrect Paste command behavior when using the Clipboard with content from Snapz Pro