This software provides an explanation of why an external hard drive, DMG or other volume cannot be safely unmounted.
Currently, WhyNotUnmount is in its alpha state, or prerelease phase, which implies that there may be some bugs, and it may not always identify the correct reason for unmounting being unsuccessful. The developer is addressing these issues at the moment to develop a stable version.
The most significant aspect of WhyNotUnmount is that it is available completely free of charge. However, due to its prerelease status, it may take some time until the application is entirely stable.
Version 0.3 Beta: N/A