Purgeable space #
By default, iStat Menus hides purgable space, so the values match the macOS Finder. “Purgeable space” contains files that macOS can and might delete if additional space is needed. Those files can include files stored in iCloud, certain large fonts, and other items.
If you’d like iStat Menus to match Disk Utility, rather than Finder, turn off Hide purgeable space on the disks tab.
Resetting hidden disks #
To reset all hidden disks, choose Reset Sensor Filtering from the Stats menu in iStat Menus.