I'm using InDesign and I am exporting a photo book for an online printing service (Blurb) in PDF/X-3 (I use unaltered an Export profile that they provided). In the Output tab of the Export Adobe PDF Settings, Color Conversion is set to No Color Conversion and Output Intent Profile Name is set to their provided CMYK.
The embedded photos, are RGB (in particular some sRGB and others adobeRGB)
Is there some tool (free and preferably on OSX) that would display the elements of the PDF and their respective icc profile info? I'm trying to verify that the images indeed have retained their original color profile and were not converted to CMYK