28+ Png Transparent Machen Mac Pics. This tip works best with simple images. Make any image into a transparent png (or gif) with nothing but preview in mac os x!

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However you can do it with more complex pictures. Once background removal process is completed, download button is enable to save. Transparent png files use the alpha option.

For changing all of a specified colour to transparent, pngweasel is excellent.

@julie to be fair, setting a png transparency colour is not a standard or simple feature, since i can't remember if iphoto does transparency. However you can do it with more complex pictures. Including transparent png clip art, cartoon, icon, logo, silhouette, watercolors, outlines, etc. For changing all of a specified colour to transparent, pngweasel is excellent.