OneDrive on Mac will sync up to one million files, up from 300,000

Microsoft is raising the number of items OneDrive officially supports syncing on a Mac from 300,000 to one million. That matches what Windows already offers. The Mac preview is due this month for Insiders, Microsoft's early-access testers, and a full release is targeted for June 2027.

What changed

Syncing means keeping the same files on your computer and in the cloud, so changes show up everywhere. Until now, Macs had a lower supported ceiling than Windows PCs. Microsoft says the increase is meant to help organizations with large OneDrive and SharePoint libraries sync more content reliably across devices.

There is a catch. Only Macs that meet hardware and configuration requirements get the higher limit. Other Macs keep the existing 300,000-item limit. The material does not spell out those requirements, and it does not mention a price.

Other additions

The same announcement adds several other features. Some are aimed at everyday users and some at IT staff.

• Copilot can analyze across several files, such as turning multiple spreadsheets into charts.
• Copilot can organize folders and save a repeated workflow as a personal skill in a Markdown file.
• A Prompt Gallery offers ready-made ideas for what to ask.
• Hero Links give each file and folder one link by default. Permissions can change while the web address stays the same.
• Administrators get a OneDrive Sync command-line tool, in private preview, for checking accounts, policies and sync status.

Who it affects

The biggest winners are teams that keep very large shared libraries and use Macs. Design, media and legal-style archives are the kind of thing that can pile up item counts quickly, though the material does not name specific industries.

Hero Links could also cut down on the clutter of old links that builds up as who may see a file changes. One gap matters: automatic expiration is still coming. Organizations that need time-limited access should check that before relying on the feature.

What to do

Treat the new limit as something to plan around, not something to count on yet. Microsoft warns that sync performance may suffer with large numbers of read-only files or accounts under legal hold. It says it is working on those cases. Anyone with libraries like that should test before moving everything over.

What happens next

The preview reaches Insiders this month. General availability is penciled in for June 2027, so a wider rollout is still months away.