Open-The-File.com

Find how to open any file type

How to open .MPW files on Mac

To open .MPW files on Mac, if it is a Microsoft Project Workspace-related .MPW file, open it on a Windows PC with Microsoft Project (macOS typically won’t have native support for this file type).

Step-by-step instructions

  1. If it is a Microsoft Project Workspace-related .MPW file, open it on a Windows PC with Microsoft Project (macOS typically won’t have native support for this file type).
  2. If it is an Exstream Empower package, transfer it to a desktop environment where your organization’s OpenText Exstream Empower tools are installed.

Common issues

The file won’t open or opens in the wrong app

.MPW is used by more than one ecosystem; your system may not know which app to use, or you may not have the correct software installed.

  1. Confirm the source: Microsoft Project/Project Workspace vs. an OpenText Exstream Empower workflow.
  2. On Windows, use “Open with…” and explicitly choose Microsoft Project for Project Workspace files.
  3. If it’s from Empower, open/import it with the Empower toolchain used by your organization (not a generic archive viewer).

It was treated like a ZIP but looks “corrupt”

Even if an .MPW is associated with a ZIP-based vendor type, it may not be intended for manual extraction or may rely on specific structure expected by Empower software.

  1. Don’t rename the file to .zip and assume it’s a normal archive; instead, use the application that produced it.
  2. If you must inspect it for troubleshooting, do so on a copy of the file and consult the workflow/tooling that generated it.

Missing or incomplete file content

If an .MPW was partially downloaded or transferred, the creating application may fail to open it or report errors.

  1. Re-download or re-transfer the file, ideally using a method that preserves file integrity (e.g., re-export from the source system).
  2. Ask the sender to provide the file again or export the related project/workspace/package anew.

Security note

Treat .MPW files from unknown sources with caution: they may be ZIP-based vendor packages (application/vnd.exstream-empower+zip) that can contain many embedded files and potentially risky content if opened/imported into complex software.

Back to .MPW extension page