A command-line MacOS sleep program (like SleepNow)

Traditional unix-style installation:

1. make Zzz
2. sudo make install
3. Is /usr/local/bin in your $PATH? If not, you can define it in your ~/.profile

Alternatively, you can use Homebrew to do the installation:

1. If needed, install brew on your mac.
2. brew install Zzz

Want to put your mac to sleep? Type 'Zzz' and it will immediately sleep (and, of course, it can be awakened in the usual way.)