Ah, I have got it –*but I am not sure what did the trick.
I downloaded the Xcode Command Line Tools from the apple developers page. Then I used the terminal phrase from this threat:
https://www.mobileread.com/forums/sh...d.php?t=264945
	Quote:
	
	
		
			
				
					Originally Posted by  eschwartz
					 
				 
				The command-line tools are installed to your system PATH on Windows and linux, but not on OSX -- because OSX uses Bundles, which have no way to trigger post-install commands I believe.   
There used to be an option in Preferences to symlink the tools into /usr/bin on OSX (like the linux installer does) but apparently the method used to get root privileges was deprecated a while back.   
The solution is to manually symlink them:
 
	Code: 
	sudo ln -sf /Applications/calibre.app/Contents/console.app/Contents/MacOS/* /usr/local/bin/ 
 
Note: My auto-upgrade script does this automatically. See here:  https://github.com/eli-schwartz/calibre-installer
Note2: I don't use OSX, I experimentally ported it from the linux script which I  do use, but I have received confirmation that it works as expected on OSX.   
EDIT: Changed to accommodate System Integrity Protection, introduced in El Capitan.  
			
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 Now I can use the command line tools from calibre – its magic 

 I love calibre!
I will write a full workflow with Hazel and Shell Script this evening in here! Thanks for your help!