Why can I not 'Print to PDF' on my Mac?

This issue is due to an incompatibility with the built-in printing software for Macintosh computers, and the solution is to connect to a printer so that different printing software can be used.  If you do not have access to a physical printer, please add a fictitious one:

1. From the Apple menu, select “System Preferences”.
   
   
    
2. In the “System Preferences” window, select “Printers & Scanners”.
   
   
    
3. In the “Printers & Scanners” window, click the “+” and select “Add Printer or Scanner…”
   
   
    
4. In the “Add” window, select the “IP” tab on the top left, enter 0.0.0.0 in the “Address:” entry, select “AirPrint” in the “Protocol:” drop-down menu, and in the “Use:” drop-down menu (which will read “Choose a Driver…”), choose “Select Software…”
   
   
    
5. In the “Printer Software” window, select “HP LaserJet Series PCL 4/5” and click “OK”.
   
   
    
6. In the new “Add” window, you can now click “Add” on the bottom right.
   
   
    
7. You should now get a warning that your computer is “Unable to verify the printer on your network.”  Click “Continue” anyway to set up the network.
   
   
    
8. In the “Setting up ‘0.0.0.0…’ ” window, click “OK”.
   
   
    

The fictitious printer should now be added, allowing Maple’s “Print to PDF” feature to work.
 

Note: After doing the above, when printing to PDF you can save to PDF directly by going to File>Print, selecting

then using the save dialog to save your file (if doing this don't hit "Print" as the fictitious printer isn't actually connected and may not do anything).