How to invert colours on iPhoto

You can invert the colours of the photographs stored in your iPhoto library, but it is not an official feature, so will require a counter-intuitive process to pull it off. However, when you finish, the result will be a stunning and bizarre graphical effect that simulates the look of photographic negatives.

You can invert the colours of the photographs stored in your iPhoto library, but it is not an official feature, so will require a counter-intuitive process to pull it off.

Select photo.

Right-click and select "Show Original File."

Right-click the file and select "Open With Preview."

Select "Tools" and "Adjust Colours."

Move the black slider all the way to the right. Move the white slider all the way to the left. This has the effect of inverting the colours in the photo.

Press "Cmd" and "S" to save.

Return to iPhoto, right-click the photo and select "Revert to Original."

Kevin Walker is a computer programmer who decided to take a few years out from the corporate life and see the world. He spent a total of six years living abroad and teaching English in China, Korea and Mexico before returning to his home in Texas. He uses his programming and teaching experience to write easy-to-understand computer tutorials.