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How to open .CAB files on Mac

To open .CAB files on Mac, if your Mac doesn’t recognize it, treat it as a Windows archive and use a third-party archive utility that explicitly supports Microsoft CAB.

Step-by-step instructions

  1. If your Mac doesn’t recognize it, treat it as a Windows archive and use a third-party archive utility that explicitly supports Microsoft CAB.
  2. If you can’t extract it on macOS, transfer the .CAB to a Windows PC and extract it using the EXPAND command.

Alternative methods

  • Open .CAB in a browser-based viewer if desktop apps fail.
  • Try opening .CAB on Mac with a secondary app to rule out app-specific issues.
  • Convert .CAB only with trusted tools when direct opening is not possible.

Common issues

The .CAB file won’t extract or reports errors

This often happens when the download is incomplete/corrupted or the CAB is part of a larger installer set and not meant to be handled alone.

  1. Re-download the CAB from the original source and confirm the file size matches what the source expects.
  2. Try extracting on Windows using EXPAND, which is commonly compatible with CAB variants used by Windows workflows.
  3. If it came with an installer/update package, use the associated installer process rather than manually extracting the CAB.

Double-clicking doesn’t open anything (or opens the wrong app)

CAB is an archive/container, and your system may not have a default handler for it (especially on non-Windows platforms).

  1. On Windows, extract from Command Prompt using EXPAND instead of relying on double-click behavior.
  2. On macOS/Linux, install an archive utility that explicitly supports Microsoft CAB, or transfer the file to Windows for extraction.

You extracted files but don’t know what to do with them

CAB files commonly contain installer resources (DLLs, INF files, MSI-related payloads) that are intended for Windows deployment/installation workflows.

  1. Look at the extracted filenames and extensions to identify the next step (for example, documentation for the software/driver/update you downloaded).
  2. If the CAB was obtained as part of a Windows Installer or system component workflow, follow the vendor/Microsoft installation instructions rather than manually running random extracted files.

Security note

CAB files are archives and can contain executable files (EXE/DLL/scripts) that may be unsafe if sourced from untrusted downloads; extract first and review contents before running anything.

Back to .CAB extension page