Download of Masterdrive 1.2.3 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Business Tools, more precisely Finances. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This Mac app is a product of Katoemba Software.
From the developer:
With Masterdrive it is very easy to maintain a administration of the drives made with your car(s) on your Mac. It supports drive templates with all the relevant information for much used drives, to make data entry as quick as possible. A mobile companion application for the iPhone is available from the AppStore to record drive information on the road.
You may want to check out more Mac applications, such as Personal Finance or Putler, which might be similar to Masterdrive.