I wish they'd just fix the bug where typing "~" crashes Terminal.app (depending on your keyboard language) :(
Edit: Here's the same bug in VLC: https://trac.videolan.org/vlc/ticket/7268
It also has great tmux support built into the client.
It's probably easier to try than it is to find out why to try it...
How did this bug survive the testing process?
Wait. I think I just answered my own question.
I can't believe there's no-one at Apple using i18n keyboard layouts and Terminal.app.
It's not like typing "~" is an uncommon event on the command line....
Meanwhile, VLC fixed the same bug (typing ~ in the VLC.app UI textfields) in about 30 minutes.