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Currently, Webex supports Remote Desktop App for AVD when it is downloaded from a direct download link.
Reference:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cloudCollaboration/wbxt/vdi/wbx-vdi-deployment-guide/wbx-teams-vdi-deployment_chapter_01.html#Cisco_Generic_Topic.dita_921105f7-dc39-4930-a7b3-77406087e451
When following the direct download page link in the deployment guide, it appears it only supports Windows OS.
There seems to be plans to support AVD in Linux TC, but the customer needs Webex to support AVD in MacOS