macOS 27 Golden Gate does not actually support CoreStorage volumes
Summary
macOS 27 Golden Gate drops support for CoreStorage and encrypted HFS+ volumes, making them unmountable and irretrievable with standard tools. The article notes a misleading boot-time dialog about macOS 28 and documents a workaround that deletes the CoreStorage volume group and restarts to complete the erase. It also highlights the author’s need to rebuild from backups, calling for better future workarounds.