GitUp for the mac is an excellent git UI. It is emphatically not just wrapping the command line (it manipulates the repo directly); you can do stuff like look at the timeline and directly edit it ("oh, delete this commit" or "move this branch tip here" or "merge these two commits" or "rewrite the message for this commit"). It's really nice.
Downsides is it's not well known, the principle dev is only doing bug fixes, and it while it's blindingly fast on small to medium repos, it doesn't scale well for larger repos.
Seconding gitup! One of those apps I didn’t mind abandoning my terminal workflow for. Great keyboard shortcuts. Really great and subtle UX for partial staging too.
Downsides is it's not well known, the principle dev is only doing bug fixes, and it while it's blindingly fast on small to medium repos, it doesn't scale well for larger repos.