Execute script on OSX

Execute script on OSX

I need to deploy an SSL certificate for my Mac systems via DC.  Unfortunately, it doesn't seem like there is any ability to simply run a script for Mac's.  I've created a Zip of with the certificate and specified the command to import it into the System keychain (/usr/bin/security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain root.crt) but the deployment always fails with 'Installable not found' 

Is there any way to easily deploy this?

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