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Dear Ezra Torres
Thank you for reaching out to the Q&A forum and sharing your experience.
According to Microsoft’s official documentation, all collaborators must use the same type of Visio application, either all desktop or all web, when co‑authoring the same file. Mixing Visio Desktop (Windows) with Visio for the Web in a single editing session is not supported and can directly lead to unexpected version conflicts.
Since there is no native Visio desktop application for macOS, users on a Mac are limited to Visio for the Web. To avoid further conflicts, your entire team should open and edit the diagram using Visio for the Web whenever at least one collaborator is on macOS.
Additionally, several users have reported that on macOS, editing Visio files through the OneDrive/SharePoint Sync folder in Finder, instead of opening the file directly in Visio for the Web, may cause synchronization conflicts, particularly with intermittent connectivity or offline changes. Please try opening the file directly in Visio for the Web (via the SharePoint link in your browser) and monitor whether the sync conflicts persist. This approach typically provides a more stable and consistent editing experience across platforms.
For your reference, you may also review the following official Microsoft resources:
- Work together on Visio drawings - Microsoft Support
- Limitations to file editing in Visio for the web - Microsoft Support
I hope this information is helpful. Please give these suggestions a try, and feel free to share an update if the issue continues, I’ll be glad to assist further.
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