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