OpenDisk now runs on macOS 15 Sequoia. On macOS 26 it keeps its Liquid Glass panels; on Sequoia they use the system's standard translucent material.
The status bar now shows how full the disk is: a capacity bar with “X available of Y”, and hovering it reveals the used, available and total figures. It refreshes after every scan, so freed space shows up right away.
Leaving a scan is now explicit: an Unmount button in the toolbar (⌘[) asks before clearing the scan and returning to the disk list. It does not eject the disk from macOS.