Compare Word Documents on Mac: 5 Ways

To compare two Word documents on a Mac, you can use the built-in Track Changes comparison feature in Microsoft Word, which merges both files into a single marked-up document showing every difference. Alternatively, you can use Apple’s Pages, a third-party diff tool, or a manual side-by-side review. This article explains each method in detail, including when to use them and how to handle common problems.

Why Compare Word Documents on a Mac?

Comparing documents is a routine task for anyone who collaborates on written work—editors, legal professionals, students, or team members reviewing multiple revisions. The goal is to see exactly what changed between two versions: added or deleted text, formatting shifts, or even comments. On a Mac, you have several options, each with its own strengths and limitations. The right choice depends on whether you need a precise, tracked-changes report, a simple visual overview, or a free built-in solution.

Method 1: Use Microsoft Word’s Compare Feature (Best for Detailed Results)

Microsoft Word for Mac includes a dedicated Compare tool that automatically merges two documents and shows differences as tracked changes. This is the most robust method for most users.

1. Open Microsoft Word on your Mac.
2. Click the Tools menu and select Track Changes, then choose Compare Documents… (Alternatively, some versions have it under Review tab > Compare.)
3. In the dialog, select the Original document (the earlier version) and the Revised document (the later version).
4. Click OK. Word will create a new document that shows the differences as tracked changes.

The result is a three-pane view: the merged document in the center, the original on the left, and the revised on the right. You can accept or reject each change individually. This method is precise and preserves formatting changes, but it requires a paid Microsoft 365 subscription or a standalone Word license.

Method 2: Use Apple Pages (Free, Built-in)

If you don’t have Microsoft Word, Apple’s Pages app (free on every Mac) can also compare documents, though with less granularity. Pages uses a feature called Track Changes that lets you review edits, but it doesn’t have a one-click “compare two files� command like Word. However, you can manually combine two documents:

1. Open the original document in Pages.
2. Turn on Track Changes (Edit > Track Changes).
3. Copy the entire content of the revised document and paste it over the original.
4. Pages will mark every change as an insertion or deletion, which you can then review.

This method is workable but messy if the documents are long or heavily formatted. It also doesn’t handle formatting changes as cleanly as Word’s Compare. For a quick visual check, you can also place two documents side by side in separate Pages windows and manually scroll through them.

Method 3: Use a Third-Party Diff Tool (For Text-Level Comparison)

When you need to compare the raw text without formatting noise, a dedicated diff tool is often better. These tools extract the text from the Word files and highlight differences line by line. Popular options include:

• DiffMerge (free, by SourceGear) – supports .docx files directly.
• Kaleidoscope (paid) – a polished Mac app with a side-by-side view.
• Beyond Compare (paid) – supports Word documents via a plugin.
• TextWrangler / BBEdit – can compare text files, but you’d need to save the Word content as plain text first.

These tools are especially useful for programmers or writers who want to see every character change without the clutter of tracked changes. However, they often ignore formatting differences (bold, italics, fonts) and may not handle tables or images well.

Method 4: Manual Side-by-Side Comparison (No Software)

If you only need to spot-check a few sections, you can simply open both documents in separate windows and arrange them side by side. On macOS, you can use Split View:

1. Open both documents in Microsoft Word or any word processor.
2. Click and hold the green full-screen button on one window, then choose “Tile Window to Left of Screen.�
3. Select the other document to fill the right side.

This method is fast and requires no special features, but it’s error-prone for long documents. You might miss subtle changes, and it doesn’t produce a report you can save or share.

Common Problems and How to Fix Them

Even with the right tool, you may run into issues. Here are the most frequent problems and solutions:

• “Compare Documents� is grayed out. This happens if you have a document open that is already tracked. Close all documents and try again from a blank window.
• Word says the files are too different. If the documents were created in different formats (e.g., .doc vs. .docx) or have very different styles, Word may fail. Convert both to the same format first.
• Changes are not showing. Make sure “Track Changes� is turned off in the original and revised documents before comparing. Otherwise, Word may merge the tracked changes instead of showing them as differences.
• Formatting differences are ignored. In Word’s Compare dialog, click the More button and check the boxes for the types of changes you want to track (e.g., formatting, comments, headers).
• Pages can’t open a .docx file. Pages can open Word files, but if it fails, try converting the file to .docx format using a free online converter or by opening it in Word and saving as .docx.

How to Choose the Right Method

Your choice depends on your specific needs:

• Need a formal, tracked-changes report? Use Microsoft Word’s Compare feature. It’s the only method that produces a clean, editable document with all changes marked.
• Need a quick visual check without software? Use Split View.
• Need to compare code or plain text? Use a diff tool like DiffMerge.
• Prefer free tools? Use Pages (with manual copy-paste) or a free diff tool.
• Need to compare many documents regularly? Invest in a paid tool like Kaleidoscope or Beyond Compare for speed and accuracy.

Costs and Alternatives

Microsoft Word is part of Microsoft 365, which costs a monthly or yearly subscription (around $10/month for personal use). Apple Pages is free and comes pre-installed on every Mac. Third-party diff tools range from free (DiffMerge) to $50–$100 for a license (Kaleidoscope, Beyond Compare). If you don’t want to pay for Word, you can use Google Docs, which has a built-in “Compare documents� feature under Tools > Compare documents. This works in any browser and is free, but you must upload your files to Google Drive first. It produces a Google Doc with tracked changes, which you can then download as a Word file.

Frequently Asked Questions

Can I compare two Word documents on a Mac without Microsoft Word?

Yes. You can use Apple Pages (with a manual copy-paste method), a third-party diff tool like DiffMerge, or Google Docs’ built-in compare feature. These are all free and work on a Mac.

Why does Word’s Compare feature not show all changes?

Word only shows changes if you have the correct options selected. In the Compare dialog, click “More� and ensure the checkboxes for “Formatting,� “Comments,� and “Headers/Footers� are checked. Also, make sure neither document has “Track Changes� turned on before comparing.

Can I compare a .doc and a .docx file?

Yes, Word can compare different formats, but it sometimes causes errors. To be safe, convert both files to the same format (preferably .docx) before comparing. You can do this by opening each file in Word and saving as .docx.

Does comparing documents in Word alter the original files?

No. The Compare feature creates a new, separate document. Your original and revised files remain untouched. You can save the comparison result as a new file.

Is there a way to compare documents in Pages automatically?

No, Pages does not have a one-click compare feature. You must manually turn on Track Changes and paste the revised content over the original. For a more automated approach, use Word or Google Docs.

What is the best free way to compare Word documents on a Mac?

Google Docs is the best free option because it has a dedicated compare feature that works in any browser. Alternatively, DiffMerge is a free desktop app that can compare .docx files directly.

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