We have found a consistent problem with the PDF Viewer that comes with Mac computers. The PDF Viewer does not give predictable results with some of our PDF files.
To correct this issue, please follow these steps:
1.) Download the official Adobe Reader software from Adobe.com.
2.) Download the files from our site (using the CTRL-Click method) and save to your computer.
3.) To open/print the files, find them in your computer file system and use the CTRL-Click to choose the program that will open the file (Adobe Reader).