sed new line replace in osx shell
$ echo abcde | sed 's/c/\'$'\n''/' ab de
last modified 2018-12-14 17:07:27
Processing time 0.0046 sec
last modified 2018-12-14 17:07:27
Processing time 0.0046 sec
$ echo abcde | sed 's/c/\'$'\n''/' ab de