MacOS support documentation and core-coreutils requirement

[2fd5]

https://github.com/Qarik-Group/disruptor/blob/c8e18640f3c5e8944e6897cecc40a341d3c4d187/scripts/shell.sh#L5

There is assumption that core-coreutils is installed and in $PATH. Shall we have that documented and if so where can I document it ?

Alternatively we could add a check for greadlink in shell.sh and display appropriate message...

[borancar]

Good point, can easily drop the assumption with a check and helpful message how to install coreutils.

[2fd5]

For future reference

MacPorts
sudo port install coreutils

Homebrew
brew install coreutils