Thanks Martin, thats helpful to know. So it looks like ICC profiles have TWO internal names 'desc' and 'dscm'. Because the script is changing the 'dscm' name but does not touch the 'desc' name these two names will be different from each other after using the script. Hmmm... I have noticed Photoshop CC and the OS appear to read different internal names from the same profile. Looks like the OS reads the internal 'dscm' name in the System Preferences / Display pane. But photoshop CC is reading the same profile and displaying the internal 'desc' name in View/Proof Setup / Custom... A bit confusing for me if those two names are different. PROBLEMS I am having problems renaming BOTH the 'dscn' and the 'desc' names with the colorsync utility. I can change one name, but not the other. Anyone else having problems changing BOTH the 'desc' and the 'dscm' names with the colorsync utility? Regards Peter Miles