Microsoft Teams Error: Screen sharing issues on macOS

Black windows, cancellations and blocked transmissions: Microsoft Teams is currently driving Apple users crazy. Incorrect memory management paralyzes screen sharing. Fortunately, there is already a final fix for this.

Black screens in Teams

Microsoft Teams users on Apple computers are reporting issues with screen sharing. When sharing the desktop, the image remains partially black and the transfer stops or does not start. This makes collaboration in virtual meetings more difficult. The error mainly occurs on systems with high memory usage or almost full memory. Microsoft has confirmed the problem and is working on help for users. Apple has not yet commented.

Delay in troubleshooting

How Microsoft (via Merill) In the future, automatic solution suggestions will be displayed directly in Teams. If the application detects an error in screen sharing, users receive specific instructions on how to fix it. Until help is available, Microsoft offers two solutions: An update to macOS Tahoe 26.4 or newer solves the problem. Alternatively, native macOS screen sharing can be activated in the settings.

We would like to inform you of a known issue that affects the reliability of screen sharing in Microsoft Teams under certain system conditions and on older macOS versions (prior to macOS Tahoe 26.4). Users may experience issues such as blank or black screen sharing, unexpected interruptions, or failure to start sharing sessions. Microsoft Support

macOS Tahoe 26.4 includes memory management changes that improve stability in screen sharing. It is unclear whether other Microsoft 365 environments are also affected.

To help users recover faster and reduce meeting disruptions, Teams will display in-product alerts when an error is detected and direct users to relevant documentation and recommended remediation actions, including a macOS update if necessary. Microsoft Support