Software⏱️ 4 min read📅 2026-06-15

How to Fix: Why do I get the 'Excel cannot open the file '(filename).xlsm' error with a file on Mac but not on Windows?

Excel cannot open the file error on Mac but not on Windows.

Quick Answer: Check if the file is a macro-enabled file (.xlsm) and try opening it in Excel 2016 or later, which supports .xlsm files.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🔧 Proven Troubleshooting Steps
  3. 🎯 Final Words

The 'Excel cannot open the file (filename).xlsm' error occurs when attempting to load an Excel file (.xlsm) on a Mac, but not on Windows. This issue affects users who have custom add-ins and complex files that rely on specific formatting or features.

This problem can be frustrating, especially when trying to troubleshoot it without access to the same resources as Windows users. In this guide, we will walk you through the steps to identify and resolve the cause of this error.

🛑 Root Causes of the Error

  • The primary reason for this issue is due to a file format compatibility problem between Excel on Mac and Windows. The .xlsm file type is specific to Excel 2007 and later versions, which may not be fully supported by older Excel installations or versions on Mac.
  • Another possible cause could be related to the way the file is being saved or opened on the Mac machine. This might include issues with file extensions, formatting, or even permissions problems.

🔧 Proven Troubleshooting Steps

Verify File Format and Compatibility

  1. Step 1: Open the Excel file (.xlsm) in a new project on your Mac to see if it opens without any issues. If it does, proceed to the next step. Otherwise, try opening a different version of the file or a similar file with a compatible format.
  2. Step 2: Check the file properties and ensure that the file extension is correct (e.g., .xlsm). You can do this by right-clicking on the file in the Finder and selecting 'Get Info' to verify the file type.
  3. Step 3: Try opening the file in Excel 2011 or later versions, as they are more likely to support the .xlsm format. If you have an older version of Excel installed on your Mac, try updating it to a newer version that supports this format.

Check File Permissions and Auto-Restore

  1. Step 1: Check the file permissions on your Mac machine by right-clicking (or control-clicking) on the file in the Finder and selecting 'Get Info'. Ensure that the ownership and permissions are set correctly for the user account you're using to open the file.
  2. Step 2: Try resetting the auto-restore settings for the file. To do this, go to the Finder preferences, select 'General', and click on the 'Restore' button next to the file type. This may help resolve any issues related to auto-restoration problems.

🎯 Final Words

To summarize, the primary cause of the 'Excel cannot open the file (filename).xlsm' error is likely due to a file format compatibility problem between Excel on Mac and Windows. By verifying file formats, checking permissions and auto-restore settings, and using newer versions of Excel, you should be able to resolve this issue and successfully load your .xlsm files.

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