macOS 27 does not support CoreStorage volumes

macOS 27 has completely dropped support for CoreStorage volumes and encrypted HFS+ drives, rendering them inaccessible and unusable without any workaround—users cannot mount, convert, or erase these volumes through standard tools like Disk Utility or diskutil. The system displays a misleading warning claiming macOS 28 (rather than 27) will discontinue support, leaving users with data trapped on expensive storage hardware with no solution.