When OneDrive stops syncing properly on a Mac, files can go missing, fail to update, or sit stuck in a pending state. Most issues come down to connection, configuration, or sync conflicts, and can usually be resolved with a few simple checks.

What OneDrive sync issues usually look like

When OneDrive is not syncing on a Mac, it is usually obvious fairly quickly. Files may not upload or download, recent changes do not appear across devices, or the sync status shows as paused or stuck.

You might also notice files with sync icons that never complete, or find that your OneDrive folder in Finder is not updating at all.

Start with a simple restart

Before changing settings, restart your Mac.

This can reset background sync processes and resolve temporary issues, especially after updates or network changes. Once your Mac restarts, check whether OneDrive resumes syncing normally.

Check the OneDrive status

Look at the OneDrive icon in the menu bar.

If it shows as:

• paused
• signed out
• or stuck syncing

click the icon and review the status.

If syncing is paused, resume it. If OneDrive is not signed in, sign back in with your Microsoft 365 account.

Confirm your internet connection

OneDrive relies entirely on a stable connection.

If your internet is slow or interrupted, syncing can stop or behave inconsistently. Try opening a website or running a quick speed test to confirm your connection is working properly.

Make sure OneDrive is up to date

Outdated versions of OneDrive can cause sync issues.

Click the OneDrive icon in the menu bar and check for updates. Keeping OneDrive current ensures compatibility with macOS and Microsoft 365 services.

Check for file conflicts or errors

Sometimes syncing stops because of a specific file.

Look for:

• files with unusual names
• very large files
• duplicate files causing conflicts

If OneDrive flags an issue, it will usually list the problem file. Renaming or moving that file can allow syncing to continue.

Check your OneDrive folder location

On a Mac, OneDrive should be linked properly to Finder.

Open Finder and locate your OneDrive folder. If files are not updating there, the sync connection may be broken or misconfigured.

If needed, unlink and relink your account in OneDrive settings to rebuild the connection.

Reset OneDrive sync

If OneDrive appears connected but is not updating, resetting it often resolves the issue.

This forces OneDrive to reconnect and resync your files cleanly. It is one of the most effective fixes when sync appears stuck without an obvious cause.

Storage limits can stop syncing

If your OneDrive storage is full, syncing will stop.

Check your available storage in OneDrive. If it is at capacity, you will need to:

• delete unnecessary files
• or increase storage

before syncing will resume.

Check how files are set to download

OneDrive uses a feature called Files On Demand.

If files are set to “online only,” they may not appear fully downloaded on your Mac. This is normal behaviour, but it can sometimes be mistaken for a sync issue.

Right-click a file and select “Always keep on this device” if you need it locally.

When to sign out and reconnect

If syncing still does not resume, signing out and back into OneDrive can help reset everything cleanly.

This rebuilds the connection between your Mac and Microsoft 365 and often resolves persistent sync problems.

When it is time to get help

If files are missing across multiple devices, or syncing issues are affecting shared folders or team environments, the problem may be deeper than a local Mac issue.

In business setups, OneDrive syncing problems can also be related to permissions, SharePoint configuration, or account structure.

If you need help getting OneDrive working properly on your Mac, Your Mac Tech can review your setup and make sure everything is syncing the way it should.