Using tmux-256color with macOS's Terminal.app

Is setting `TERM=tmux-256color` expected to work on Terminal.app?

Line drawing is degraded and I get multiple characters while typing. If I run `reset` I get 

```
reset: can't initialize terminal type tmux-256color (error -1)
Terminal type?
```

tmux v2.6
macOS 10.13.3