Multiple synchronizaton issues

Here are some tips for faster help.

Share your macOS version.

Are you using Apple Silicon (M1/M2/M3) or an Intel Mac?

Do you have Files On-Demand enabled? (Check OneDrive settings > Settings > Files On-Demand).

Without precise information, one can only guess and I don't think anyone here wants to. That is usually the main reason why no one takes up the topic, as it is time-consuming to even understand in which digital environment the issue arises, or even to suggest a solution.

Nevertheless, here is an attempt to provide some possible solutions that might help you.

Force a Full Sync

Click the OneDrive icon in the Mac menu bar (top right).

Click Help & Settings > Pause Syncing (select “2 hours”).

Quit OneDrive (Command + Q).

Relaunch OneDrive from Applications.

Click Help & Settings > Resume Syncing.

Manually Force a Download (For Urgent Files)

Go to OneDrive Web (onedrive.com) and confirm the latest version is there.

Right-click the file and choose Download.

Save it somewhere safe (e.g., Desktop), then open it outside of OneDrive.

If you must edit it, do NOT save it back to OneDrive yet. We’ll fix syncing first.

Check for Stuck Uploads

Click the OneDrive icon.

Look for any files showing "Processing changes" or errors.

If you see an error, pause syncing, rename the affected file (add _OLD or similar), and try again.

Check OneDrive's File Version History

Sometimes, OneDrive gets stuck serving an older file version.

Go to OneDrive Web.

Right-click the file > Version History.

Restore the most recent version if needed.

IF THE ISSUE PERSISTS (Should be used with caution, possibly back up files beforehand.)

Reset OneDrive Completely

Quit OneDrive (Command + Q).

Open Terminal (Finder > Applications > Utilities > Terminal).

Run this command to reset OneDrive:

onedrive –reset

Restart your Mac.

Relaunch OneDrive and sign in again.

This forces OneDrive to rebuild its sync database.

Possible Reasons for Recent Problems

Some files stay offline until you open them, leading to old versions appearing.

More aggressive file conflict detection is causing more merge conflicts.

If you updated your Mac, OneDrive might need new permissions.

My answers are voluntary and without guarantee!

Hope this will help you.

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