System requirements
For information and a complete overview on Sametime® Meetings 11.6 system requirements, see the System requirements article. Generally, all Chromium-based browsers are supported to use Sametime Meetings.
For Windows environments, allow video and screen sharing capabilities from the browser.
For macOS environments, the user must have administrator rights to promote the security features to include screen recording for each browser separately.
Contact your administrator regarding permissions and configuration of allowed browsers.