You’ll need a key in the registry for each printer that you want this setting to be the default.

Registry keys under the HKEY Current User allow you to apply this setting. To make things more complicated, the key is set per-computer, per-user, per-application, per-printer: The location for Adobe Acrobat 7, Adobe Acrobat 8, Adobe Reader 8, Adobe Acrobat 9, and Adobe Reader 9 are all different and use slightly different methods to apply this setting. But where do you set it as default and how do you set it for multiple users on a machine and multiple machines on a network? Fortunately, the “Print as Image” setting is a work-around for these problems. This is a rather buried location for a setting that can bring down a printer or printing system (PDFs and PS driver do not always play nicely together and sometimes poorly-formed PDFs can bring down an HP Laserjet printer with a service engine error: “49.00FF Service Error”). To get to this setting, you would go File -> 1. For certain printers, certain PDF documents, and certain print setups, using the “Print as Image” setting in Adobe Acrobat and Adobe Reader is the only way to reliably get a print job to succeed.

Make adobe reader default mac