Great Tool
If you have a PDF file that was designed to print on paper that is larger than your printer will handle, then you had limited choices on how you could print the file. You could take it to a copy shop and pay big bucks to print it on a large format printer. You could click on the scale to fit button in the print dialog and have the software shrink the image down so small you couldnt read it, or you could spring for the full version of Adobe Acrobat ($$$).
This application does one thing and does it well. It allows you to print a PDF over multiple pages. You just need to use it once, and it will pay for itself.
Perhaps someday Apple will include this functionality in Preview. Until they do there is Mindcad Tiler.
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Mindcad Tiler