Category "gitk"

How can I visualize per-character differences in Git Gui staged changes view?

Currently it only shows the lines that are different. Is there any way to make it visualize per-character difference inside those lines, same way as it does in

Install gitk on Mac

How can I install gitk on a Mac? From their official website, it seems gitk comes with Git, but the version of my Git (git version 1.7.12.4 (Apple Git-37)) does