Beware of differences in Mac OS shell commands executed by /bin/bash and /bin/sh.
These are not the same shell, despite the version output (example on Mac OS High Sierra). The version output is identical as shown below:
>/bin/sh --version GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin17) Copyright (C) 2007 Free Software Foundation, Inc. >/bin/bash --version GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin17)
Yet, the behaviour of these two binaries differs, for example in the echo command:
>/bin/sh sh-3.2$ echo -n "test" -n test sh-3.2$
>/bin/bash bash-3.2$ echo -n "test" testbash-3.2$
Note that echo in /bin/sh does not recognize “-n” and simply outputs the string, while /bin/bash recognizes the switch to mean omit newline.