Terminal command ncdu
Solution 1:
No, ncdu is not natively available in OSX. But, if you want it, you can install it via homebrew. You just need to type the following to install it:
brew install ncdu
This is the version available:
$ brew info ncdu
ncdu: stable 1.10, HEAD
http://dev.yorhel.nl/ncdu
Not installed
From: https://github.com/Homebrew/homebrew/blob/master/Library/Formula/ncdu.rb