how to run shell script mac code example

Example 1: make shell script executable

chmod +x filename.sh

Example 2: run sh from terminal mac

chmod +x fileName
bash fileName

Example 3: how to run shell script

chmod +x <fileName>
./fileName.  # or use ->. bash fileName

Example 4: how to run shell script

include 
#!/bin/bash (1st line inside yourfile.sh)

to run
./yourfile.sh

if you do not include that line
bash yourfile.sh