DriveTracker for Mac is a functional application for monitoring drive space, but ultimately lacks many useful features.
After an easy installation, DriveTracker for Mac opens to a fairly intuitive and easy-to-use interface. The top of the window has a box where the user can click well-labeled buttons to add or remove drives. The application read the available drives accurately during testing. A second box in the lower left displays the drives that are being read, as well as the used space and the percentage of the total space available. It also lists additional information on the disk's threshold of use, as well as an estimated remaining life for the drive. During testing, it stated the drive would last 99 years, which is a questionable result, but one that could update as the program has more time for analysis. A graph window also displays the use over time, which is a good feature. In the program's preferences the user can set the default drive threshold, as well as set options--such as automatically refreshing drive info. every 24 hours, ignoring unavailable drives during refresh, and others--on or off.
Overall, DriveTracker for Mac performs well. It may lack advanced features, but it's easy to use and easy to read.