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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.

What's New

Version 0.3 improves user interface and stability.


Mac OS X 10.4.11 or later

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5 1


Current Version (0.x)


Downloads 3,345
Version Downloads 2,587
Type Utilities / System
License Free
Date 18 Dec 2008
Platform OS X / PPC 32 / Intel 32
Price Free
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