Office Settings & Configuration

How to Use a Custom Word Dictionary on Another Mac

Adam DavisAdam Davis Oct 16, 2026 870 views

Question details

The user wants to configure a second Mac to recognize and use an existing Microsoft Word custom dictionary that is stored in a shared location.

How to Use a Custom Word Dictionary on Another Mac
Product
Microsoft Word
Device & OS
macOS
Scenario
Accessing and syncing a custom spelling dictionary across multiple Mac computers using a shared cloud folder like OneDrive.
Observed behavior
Needs the exact steps to add an external or shared dictionary file to Microsoft Word's spelling preferences on a new or secondary Mac.
Before you start

Ensure that your custom dictionary file (.dic) is saved in a cloud storage folder (such as OneDrive or iCloud) that is actively syncing and fully accessible on your second Mac.

Solution 1Recommended

Add a Shared Custom Dictionary in Word for Mac

Follow these steps to link an existing custom dictionary file stored on a shared drive to Microsoft Word on your second Mac.

By keeping your custom dictionary in a synced cloud folder, any new words you add on one Mac will automatically be recognized on the other. Wait for the cloud drive to complete its initial sync before proceeding with these steps.

1
Open Word Preferences

Launch Microsoft Word on your second Mac. Click on 'Word' in the top Apple menu bar and select 'Preferences'.

2
Access Dictionary Settings

Under the 'Authoring and Proofing Tools' section, click on 'Spelling and Grammar'.

3
Add the Custom Dictionary

Click the 'Dictionaries...' button to open your list of dictionaries. Then, click 'Add' to open the Mac file browser.

4
Locate and Enable the File

Navigate to the synced folder (e.g., your OneDrive directory) where your custom dictionary (.dic) is stored. Select the file and click 'Open' or 'OK'.

5
Restart Microsoft Word

Verify that the checkbox next to your newly added dictionary is ticked to enable it. Click 'OK' to save the changes, and fully quit and restart Word to apply the new spelling settings.

Add a Shared Custom Dictionary in Word for Mac
Matching the Proofing Language: Make sure the language setting assigned to your custom dictionary matches the proofing language of your current document, otherwise the spell check may ignore your custom words.
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Frequently Asked Questions

Where is the default custom dictionary stored on a Mac?

By default, Microsoft Word for Mac stores its local custom dictionary deep in the library folder, specifically at `~/Library/Group Containers/UBF8T346G9.Office/Custom Dictionary`.

Can I share a custom Word dictionary between a Windows PC and a Mac?

Yes. Custom dictionaries are simple plain text files with a .dic extension. You can store this file in a cloud syncing service like OneDrive or Dropbox, and add it manually to the dictionary preferences in Word on both Windows and macOS.

Why is my custom dictionary grayed out when I try to add it?

The file might be saved in a read-only location or lacks the proper format. Ensure the dictionary file has read and write permissions on your current Mac and is formatted as a plain text file with a .dic extension.