Environment: OneDrive for Mac (App Store version), macOS 26.6.2, Apple Silicon MacBook Pro, personal account. Symptom: After OneDrive has had no edits to existing files for a while (observed at about 14 and 21 minutes), the next new file added to OneDrive never finishes uploading. Sync Activity shows it retrying endlessly, and files added afterward queue behind it. What clears it: Appending one line to any already-synced file (echo x >> existing.txt). The stuck file uploads within a minute or two. Quitting and restarting OneDrive, but the next new file gets stuck again. Reproduction (2026-09-10): Append a line to an already-synced file, then within 10 seconds create a new 5 KB file. It uploads normally. Leave OneDrive idle for 21 minutes (no activity in Sync Activity), then create a new 5 KB file. It gets stuck, retrying. Append a line to an already-synced file. The stuck file uploads immediately. Ruled out: file type, content, and size (a PDF, an edited Excel file, and random 5 KB and 90 KB files were all affected); extended attributes (an attribute-free copy also got stuck); a single folder; invalid file names. The problem persisted through an OneDrive App Store update and a full OneDrive reset, over several days.

I can confirm that I am experiencing exactly the same issue with OneDrive on my Mac Studio (Apple Silicon). System: macOS 27.0.1 OneDrive version: 26.168.0830.0006 New files added to my OneDrive folder are not automatically uploaded to the cloud. Synchronization only resumes after I manually pause and resume OneDrive syncing. The problem also occurred on macOS 26, so it is not specific to macOS 27. This is a recurring issue and makes OneDrive unreliable, as files may remain unsynchronized without any clear warning. Microsoft, could you please acknowledge this issue and provide information about a possible fix?

OneDrive for Mac: new-file uploads loop forever after a quiet period; editing any existing synced file clears it

Ulvi Yurtsever 15

Environment: OneDrive for Mac (App Store version), macOS 26.6.2, Apple Silicon MacBook Pro, personal account.

Symptom: After OneDrive has had no edits to existing files for a while (observed at about 14 and 21 minutes), the next new file added to OneDrive never finishes uploading. Sync Activity shows it retrying endlessly, and files added afterward queue behind it.

What clears it:

Appending one line to any already-synced file (echo x >> existing.txt). The stuck file uploads within a minute or two.
1. Quitting and restarting OneDrive, but the next new file gets stuck again.
Reproduction (2026-09-10):
1. Append a line to an already-synced file, then within 10 seconds create a new 5 KB file. It uploads normally.
2. 1. Leave OneDrive idle for 21 minutes (no activity in Sync Activity), then create a new 5 KB file. It gets stuck, retrying.
  2. 1. Append a line to an already-synced file. The stuck file uploads immediately.
  3. Ruled out: file type, content, and size (a PDF, an edited Excel file, and random 5 KB and 90 KB files were all affected); extended attributes (an attribute-free copy also got stuck); a single folder; invalid file names. The problem persisted through an OneDrive App Store update and a full OneDrive reset, over several days.

Ulvi Yurtsever 15 Reputation points

2026-09-28T19:07:45.7033333+00:00

Update — September 28, 2026

The problem persists with the current Mac App Store release, OneDrive 26.163.0823. I can now characterize the problem more precisely.

The failure is specific to newly created files. New files are detected by OneDrive, but their uploads repeatedly fail/stall in a loop. This is not related to OneDrive having been idle; it can happen immediately after OneDrive has been restarted.

By contrast, existing synchronized files that are modified continue to upload normally. Thus, OneDrive remains connected and capable of uploading changes to existing files while simultaneously failing to upload newly created files.

Quitting and restarting OneDrive clears the new files that are currently stalled, and they upload successfully. However, newly created files can then immediately encounter the same problem again.

Previously, modifying an existing synchronized file (odkick) would cause stalled new files to upload. That workaround no longer works. The modified existing file itself uploads normally, but the stalled new files remain stalled.

Thus, the problem appears specifically associated with OneDrive's handling/upload of newly created sync items, rather than with general synchronization, connectivity, or an idle-state transition. Updating from 26.158.0816.0002 to 26.163.0823 has not fixed it.
Ulvi Yurtsever 15 Reputation points

2026-09-28T19:54:50.2333333+00:00

Update — September 28, 2026

I have now updated to the newly released Mac App Store version OneDrive 26.168.0830.

There is no change in behavior. Newly created files are still detected but remain stuck in the upload loop, while modifications to existing synchronized files continue to upload normally.

Quitting and restarting OneDrive clears the currently stalled new files, but newly created files can immediately encounter the same problem again.

So this issue is now confirmed to persist across 26.158.0816.0002, 26.163.0823, and 26.168.0830.
Dieter König 0 Reputation points

2026-09-28T20:36:41.36+00:00

I can confirm this. I am on 26.163.0823.0004 and the problem still exists.

It is astonishing how Microsoft does nothing to solve it.

This is extremely annoying and unprofessional.

The recommendation by Microsoft support to change from the Appstore version to the Microsoft Standalone version is a joke.
dawei 0 Reputation points

2026-10-07T08:20:06.2566667+00:00
Same issue here. OneDrive standalone 26.168.0830.0006 on macOS 26.7.1 (Intel MacBook Pro). About 6,400 new files have been stuck in "Uploading" for more than a month, while edits to existing files still upload. After a restart, uploads run for about 8 minutes and then stop. SyncDiagnostics.log shows FilesToUpload = 6387 and numFileFailedUploads = 43097. I have also sent a report with logs from the OneDrive app.

OneDrive for Mac: ~6,400 newly created files never upload; sync engine stuck in an upload-failure retry loop

Environment

OneDrive standalone 26.168.0830.0006, Files On-Demand (File Provider)

macOS 26.7.1 (25G241), MacBook Pro 16,2 (Intel)

Personal account (a work account is also signed in on this Mac)

Symptoms

Activity Center has shown "Uploading 6,371 files" for more than a month. The count never reaches zero.

Newly created files never upload. Edits to existing synced files still upload.

After OneDrive restarts, uploads run for about 8 minutes and then stop completely.

While stuck, OneDrive uses about 200% CPU with almost no network traffic, writes about 290 SyncEngine .odl files per minute, and OneDrive.dat-wal has grown to 2.6 GB.

Data from this Mac

SyncDiagnostics.log: FilesToUpload = 6387, numFileFailedUploads = 43097, numFileUploads = 492, numUploadErrorsReported = 0.

Process sample: UploadGate::CleanUpFailedActiveUploads -> RequeueOrRemoveUpload -> NotifyUploadRemoved -> DriveInfo::RequestPreciseScanIfFileExistsElseFullScan -> PeriodicRetryList::AddToPeriodicRetryList.

ODL logs show AssignIdsToDriveChange events followed by libraryError for the affected files.

Two new test files did not upload within 4 minutes.

This matches Microsoft Q&A question 6000152 ("new-file uploads loop forever after a quiet period").

Questions

Is a fix planned, and in which build?

If I unlink this Mac or reset OneDrive, will the ~6,400 unsynced local files be preserved?

Is it safe to install an older build, such as 26.153.0809, until the fix ships?

6 answers

Paweł Czyżyk 0 Reputation points

2026-10-09T07:58:28.1066667+00:00

I can confirm that I am experiencing exactly the same issue with OneDrive on my Mac Studio (Apple Silicon).

System: macOS 27.0.1 OneDrive version: 26.168.0830.0006

New files added to my OneDrive folder are not automatically uploaded to the cloud. Synchronization only resumes after I manually pause and resume OneDrive syncing.

The problem also occurred on macOS 26, so it is not specific to macOS 27.

This is a recurring issue and makes OneDrive unreliable, as files may remain unsynchronized without any clear warning.

Microsoft, could you please acknowledge this issue and provide information about a possible fix?
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OneDrive for Mac: new-file uploads loop forever after a quiet period; editing any existing synced file clears it

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