Disk Inventory X  Disk Inventory X is a disk space analyzer utility for Mac OS X 10.3 and later. Inspired by WinDirStat, it shows the sizes of files and folders in a graphical treemap. Version 1.3 of Disk Inventory X added support for macOS 10.15 Catalina, while the earlier version 1.2 added support for macOS 10.14 Mojave and its dark mode feature.