Lucid Nonsense


Preview and CMYK Images in Snow Leopard

Sunday, 3 January 2010

An irritating error that I’ve come across before (but managed to forget about) is that Snow Leopard’s Preview will happily open a CMYK image with no indication that it can’t save them if you make a change to the file. If you adjust the image in any way and attempt to save you receive the amazingly helpful error message “The document … could not be saved”.

If you convert it to RGB first, then that’s not a problem, but obviously you need to firstly realise that it’s CMYK and if you’ve made a series of changes, and annotated the image, it’s annoying to realise when you come to save that those changes are gone and there’s not much you can do about it. As a result I’ve just started using Acorn for simple annotations and changes as it warns you if the image is CMYK and that it will convert to RGB when you save.


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