mBAE

mBAE opens Bethesda game archives and extracts their files to a folder you choose. Drop a Skyrim Special Edition .bsa or a Fallout 4 or Starfield .ba2 anywhere on the window to see its content.

The file list shows each path, size and compression, with sortable columns. Extract all writes everything to the destination with a progress bar and keeps the folder structure. zlib and LZ4 compression are both handled.

Extraction is guarded against bad archives. Files whose internal path is absolute or contains .. are skipped, so nothing is written outside the destination folder.

The app is the Mac counterpart of Bethesda Archive Extractor on Windows and covers its main use: looking inside an archive and pulling out meshes, textures or scripts to inspect or patch them.

Earlier versions were packaged Python. The current one is written in Swift, with a Language menu, an About window and a daily update check. It ships as an arm64 build for macOS 15 or later, signed with a Developer ID and notarized, in English, French, Spanish and Italian.