Microsoft Teams: Known issue affecting screen sharing on macOS

Microsoft Teams on macOS (versions earlier than Tahoe 26.4) has a known screen sharing issue causing blank or interrupted shares. From late June to mid-July 2026, in-product guidance will help users troubleshoot, recommending macOS updates or enabling “Use Mac OS native sharing” in Teams settings. What and Why: We are informing you of a known issue affecting screen sharing reliability in Microsoft Teams on macOS under certain system conditions and on older macOS versions (earlier than macOS Tahoe 26.4). Users may experience scenarios such as blank or black screen sharing, unexpected interruptions, or failures to start sharing sessions. To help users recover more quickly and reduce meeting disruption, Teams will begin surfacing in-product guidance when a failure is detected and direct users to relevant documentation and recommended remediation steps, including updating macOS where applicable. Rollout Schedule: Update to the latest macOS version now. We will begin rolling out in-product guidance for screen sharing failures in late June 2026 and expect to complete by mid-July 2026 Impact on Your Organization: Who is affected: Users in GCC, GCC High, and DoD environments who use Microsoft Teams on macOS Users on older macOS versions (earlier than macOS Tahoe 26.4) Users whose devices are experiencing system constraints, such as low memory or disk pressure IT admins and helpdesk teams that support macOS device update policies and Teams troubleshooting Platforms/Services: Platform: macOS Service: Microsoft Teams Cloud instances: GCC, GCC High, DoD What will happen: Users may encounter screen sharing issues such as: Blank or black screens during sharing. Unexpected interruptions during sharing sessions. Failure to start screen sharing. When a failure is detected: Users will see an in-product message prompting them to retry sharing. Where applicable, users will be prompted to update their macOS version. Updated documentation will outline common causes and remediation steps. Updating to macOS Tahoe 26.4 or later resolves the issue. As a mitigation, users can enable: Teams Settings > General > Screen sharing > Use Mac OS native sharing. No restart is required after changing this setting. This guidance experience is enabled by default; no admin configuration is required. Action Required/Recommendations: […]

The post Microsoft Teams: Known issue affecting screen sharing on macOS appeared first on M365 Admin.