shellExecute(cmd)
Executes a shell command and returns the result, currently Mac only.
BE CAREFUL!
Type: function
Parameter(s):
- cmd {String}:The shell command to execute 
Returns:
- 
    {String}:
 { description_of_the_return_value } 
Executes a shell command and returns the result, currently Mac only.
BE CAREFUL!
Type: function
Parameter(s):
The shell command to execute
Returns:
{ description_of_the_return_value }