WhyNotUnmount 0.3 for Mac can be downloaded from our website for free. The default filename for the application's installer is WhyNotUnmount0.3.dmg. The bundle identifier for this app is org.tlensing.WhyNotUnmount. This free Mac app was originally developed by Tobias Lensing. The most popular version among the program users is 0.3. The program lies within System Tools, more precisely Device Assistants.
From the developer:
WhyNotUnmount is a tool that explains why unmounting a certain external volume is not possible. Usually this is because files on the volume remain opened by an application. WhyNotUnmount checks which application blocks your volumes from being unmounted properly.
You may want to check out more Mac applications, such as PSPWare, ecoDrive or Syncman, which might be similar to WhyNotUnmount.