Posterazor

If you need to make a small image bigger and print it out, Posterazor is the Mac tool that will let you split up the picture or page in several parts so you can print it at home without having to make a trip Kinkos.

Posterazor takes the image and dumps it into a PDF file where each page is associated with a predefined area on the original picture. You can choose the final size using the program preferences. You'll also need to set the image's overlay size and where it'll be placed and aligned.

After all of the pages have been printed, the only thing left to do is gluing them together to create the final enlarged image.