Converting the line ending of a file on your Mac from dos or windows format to Mac format is as simple as
entering the following command in an iTerm terminal window.
tr '\r' '\n' file-with-mac-newline.txt
Or as oreng asserts
actually it should be :
tr ‘\r’ ‘\n’ < file-with-mac-newline.txt
I spent quite a while looking for a
dos2mac type program, expecting to find
dos2unix for the mac, when I came across the
tr command that does just what I wanted.