How to "print" a PDF on a Mac so that is automatically sent by AirDrop to an iOS device?
If you actually use iCloud &amp; iCloud Drive, Print to PDF and then save the PDF to iCloud and it will show on your iPad. Thats why iCloud Drive is there.

Or if you just have to use AirDrop, then: 

Why not print to PDF then share the PDF via AirDrop? 

It appears to be much easier using either method than to create an automation to get the same effects.