The 1.0 version of EDPcalc for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. EDPcalc for Mac lies within Productivity Tools, more precisely Calculators. This free software for Mac OS X is an intellectual property of Marley Watkins.
From the developer:
EDPcalc is a standalone Macintosh program for evidence-based practice that computes posterior probability when given prior probability and likelihood ratio. The application is very easy to use, all you need to do is to insert prevalence probability and the diagnostic likelihood.
You may want to check out more Mac applications, such as PinholeCalc, MiaPrintingCalculator or Houbysoft Calculator, which might be similar to EDPcalc.