Summary
- OneDrive on macOS will support syncing up to 1 million items per sync instance, per device, increasing the current supported limit from 300,000 items.
- The change is intended for users with very large OneDrive, OneDrive for Business, or SharePoint document libraries that need more reliable sync at scale.
- Public Preview is limited to macOS devices enrolled in the Insiders ring and only on devices that meet the minimum hardware and configuration requirements.
- Devices that do not meet the minimum requirements will continue to sync at the existing 300,000-item limit with no disruption.
- Microsoft recommends reviewing sync configuration and preparing helpdesk/users if you plan to evaluate the preview.
Microsoft is raising the OneDrive sync item limit on macOS from 300,000 to 1 million items per device. A public preview begins in mid October 2026 for insiders ring users, with general availability following later. Administrators should review device hardware specifications and identify users with large libraries who might benefit from this expanded capacity.
Administrator impact: Review hardware prerequisites and identify users with large file libraries who may benefit from the new sync limits.
End user impact: Mac users with large libraries can sync up to 1 million items provided their hardware meets the required specifications.
Score rationale: This is a feature expansion that improves storage capacity for macOS users without causing service disruptions.
Recommended sync app configuration | Restrictions and limitations in OneDrive and SharePoint | The OneDrive sync app update process
OneDrive sync on macOS will increase its item limit from 300,000 to 1 million per device, starting with a Public Preview in mid-October 2026 for Insiders ring users. Devices not meeting hardware requirements will remain at the current limit, with no disruption expected.
Primary Service: OneDrive
Admin Impact: Medium
User Impact: Medium
Release Start: 15 Oct 2026
Release End: 31 Oct 2026
Published: 23 Sept 2026
Expires: 30 Nov 2026
Last updated: 23 Sept 2026
Roadmap ID: 570448
Platforms: Mac
Services: Mac, OneDrive, SharePoint
Category: Stay informed
Tags: Admin Action, Feature Update, User Adoption
History
9/22/2026 Item Added to Message Center
Microsoft Message
In MC1294528, we announced an increase to the item sync limit for OneDrive on Windows. We are now increasing the same item sync limit for OneDrive on macOS: from 300,000 items to 1 million items per sync instance, per device. This increase is designed to help organizations with large OneDrive and SharePoint libraries sync more content reliably across devices.
The capability will be available first in Public Preview for devices enrolled in the Insiders ring, and later in General Availability. Devices that do not meet the minimum hardware and configuration requirements will continue to sync at the existing supported limit of 300,000 items without disruption.
Rollout schedule
Public Preview (Worldwide): Rollout will begin in mid-October 2026 and is expected to complete by late October 2026.
Impact on your organization
Who is affected
- Users syncing OneDrive, OneDrive for Business, or SharePoint document libraries on macOS.
- Users with libraries that approach or exceed the current supported sync limit of 300,000 items.
- Preview participants using the Insiders ring.
Platforms and services
- macOS
- OneDrive
- OneDrive for Business
- SharePoint document libraries
What will happen
- macOS devices that meet the minimum hardware and configuration requirements can sync up to 1 million items per sync instance. Devices that do not meet these requirements will see no change in behavior.
- No disruption to existing sync configurations is expected.
Note: Performance is not yet optimized for syncing a high volume of read-only files or for accounts under legal hold. We are actively working to improve performance and reliability for these scenarios.
Action required and recommendations
No action is required if you do not plan to participate in Public Preview. If you plan to evaluate this capability:
- Identify users and devices with large OneDrive or SharePoint libraries that may benefit from the increased sync limit.
- Ensure devices meet the minimum hardware and configuration requirements (i.e., supported operating system, memory, storage, and processor).
- Review the recommended sync configuration for OneDrive and SharePoint sync reliability.
- Inform helpdesk staff and affected users that Public Preview requires the Insiders ring and that devices that do not meet the minimum hardware and configuration requirements will remain at the current supported limit.
Learn more
- Recommended sync app configuration – SharePoint in Microsoft 365 | Microsoft Learn
- Restrictions and limitations in OneDrive and SharePoint | Microsoft Support
- The OneDrive sync app update process – SharePoint in Microsoft 365 | Microsoft Learn
Compliance considerations
No compliance considerations identified. Review as appropriate for your organization.