Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings

Title: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings User impact: Mac users may have seen distorted content when sharing their full screen in Microsoft Teams meetings or recordings. Final status: We've completed deploying a code fix, and we've validated with internal testing and monitoring that it successfully remediates the issue. If users are still experiencing impact, they may need to restart their Microsoft Teams client to receive the fix. Scope of impact: This issue may have impacted Microsoft Teams for Mac users on client versions 26134.1610.4759.7759, 26149.1804.4788.5681, and 26163.407.4839.8659 when attempting to share their full screen in Microsoft Teams meetings. Start time: Thursday, July 9, 2026, at 12:00 AM UTC End time: Monday, July 13, 2026, at 8:15 PM UTC Root cause: The Microsoft Teams for Mac presentation encoder was producing distortion issues when encoding some non-aligned resolutions, which resulted in impact. Next steps: - We're further reviewing the Microsoft Teams for Mac presentation encoder to identify what caused it to produce distortion issues when encoding some non-aligned resolutions, to gain a further understanding of the underlying root cause, and to prevent similar impact from reoccurring. This is the final update for the event.

Title: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings User impact: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings. More info: As a way to bypass impact, affected users may experience improvement by attempting any of the following methods: - Share a specific application window instead of the entire screen. - Adjust the display resolution to be at or below 1710 × 1112 (e.g., 1512 × 982). - Utilizing the Teams web client, if available. Impact is specific to Microsoft Teams MacOS client versions 26134.1610.4759.7759, 26149.1804.4788.5681, and 26163.407.4839.8659. Current status: We're continuing our efforts to assess and develop potential remediation strategies in order to correct the encoder distortion issue and remediate all impact. Scope of impact: This issue may impact Microsoft Teams for Mac users on client versions 26134.1610.4759.7759, 26149.1804.4788.5681, and 26163.407.4839.8659 when attempting to share their full screen in Microsoft Teams meetings. This section may be updated as our investigation continues. Root cause: The Microsoft Teams for Mac presentation encoder is producing distortion issues when encoding some non-aligned resolutions, which is resulting in impact. Next update by: Monday, July 13, 2026, at 11:30 PM UTC

Title: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings User impact: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings. More info: As a way to bypass impact, affected users may experience improvement by attempting any of the following methods: - Share a specific application window instead of the entire screen - Adjust the display resolution to be at or below 1710 × 1112 (e.g., 1512 × 982). - Utilizing the Teams web client, if available. Impact is specific to Microsoft Teams MacOS client versions 26134.1610.4759.7759, 26149.1804.4788.5681, and 26163.407.4839.8659. Current status: We've determined that the Microsoft Teams for Mac presentation encoder is producing distortion issues when encoding some non-aligned resolutions, which is resulting in impact. We’re assessing potential remediation strategies aimed at correcting this encoder distortion issue and resolving impact. Scope of impact: This issue may impact Microsoft Teams for Mac users on client versions 26134.1610.4759.7759, 26149.1804.4788.5681, and 26163.407.4839.8659 when attempting to share their full screen in Microsoft Teams meetings. This section may be updated as our investigation continues. Start time: Thursday, July 9, 2026, at 12:00 AM UTC Root cause: The Microsoft Teams for Mac presentation encoder is producing distortion issues when encoding some non-aligned resolutions, which is resulting in impact. Next update by: Monday, July 13, 2026, at 7:00 PM UTC

Title: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings User impact: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings. More info: As a temporary workaround, affected users may experience improvement by changing their display resolution settings or adjusting the size of the shared application window before initiating screen sharing. Current status: While our investigation into the potential screen resolution configuration issue is ongoing, we're providing as subset of affected users with a temporary workaround to modify the size of the shared window to the standard resolution, which should restore functionality while we investigate. Scope of impact: This issue may impact Microsoft Teams for Mac users on client versions 26134.1610.4759.7759, 26149.1804.4788.5681, and 26163.407.4839.8659 when attempting to share their full screen in Microsoft Teams meetings. This section may be updated as our investigation continues. Next update by: Monday, July 13, 2026, at 5:30 PM UTC

Title: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings User impact: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings. More info: As a temporary workaround, affected users may experience improvement by changing their display resolution settings or adjusting the size of the shared application window before initiating screen sharing. Current status: We've observed that the issue may be related to a specific screen resolution configuration used on macOS devices. We're reviewing diagnostic data and telemetry to validate this theory, identify the underlying cause, and determine the appropriate mitigation steps. Scope of impact: This issue may impact Microsoft Teams for Mac users on client versions 26134.1610.4759.7759, 26149.1804.4788.5681, and 26163.407.4839.8659 when attempting to share their full screen in Microsoft Teams meetings. This section may be updated as our investigation continues. Next update by: Saturday, July 11, 2026, at 8:00 PM UTC

Title: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings User impact: Mac users may see distorted content when sharing their full screen in Microsoft Teams meetings or recordings. Current status: We’re reviewing associated support case details to understand more about the issue, and determine our next troubleshooting steps. Scope of impact: This issue may impact Microsoft Teams for Mac users on client versions 26134.1610.4759.7759, 26149.1804.4788.5681, and 26163.407.4839.8659 when attempting to share their full screen in Microsoft Teams meetings. This section may be updated as our investigation continues. Next update by: Saturday, July 11, 2026, at 3:00 PM UTC