MacOS

From ColorWiki

On the Mac operating system, your ICC printer profile can be placed in one of two locations:
• If you want system-wide access to the profile (i.e. all users), it belongs in:

/Library/ColorSync/Profiles.

To find this folder, double-click your hard drive icon, then “Library,” “ColorSync,” and “Profiles.” Drag the profile into this folder.

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• If you would prefer to make your profiles available only to one user, enter that user’s home directory (Choose Go Home in the Finder), then:

“Library,” “ColorSync,” and “Profiles.”

Drag the profile into this folder.