The process of "installing" an ICC color profile is nothing more than pasting (or drag and drop) into a specific folder in the operating system. Your printing software looks in that folder when it comes time to print. It then creates a profile list you can choose from in the print dialog.
If you use Photoshop CS4 or earlier, or Photoshop Elements, restart your computer after following these instructions.
Learn better by reading?
This video covers how to install profiles on macOS 13 Ventura. If you're using OS12 and older, scroll down.
This video covers how to install profiles on most versions of the macOS up to 12 Monterey. If you're using OS 10.11, scroll down for a video specific to that version.
Next Steps - Using Profiles
After the profile is installed, you will select them in the print dialog of your photo or editing software. Get Tutorials on how to use ICC printer color profiles.
Windows user? Click for Windows instructions