Written for the Mac using Tiger (PowerPC and Intel) and above. Compiled Universal Binary and runs on Leopard. This program opens a print ready pdf and will calculate the ink or toner coverage of the file. A perfect solution for needing to know approximately how much a print job will cost before printing. This is a small easy to use application that does one thing - reads ink or toner coverage and gives you the calculated results based on the yield results listed by the manufacturer.