The Skype for Business on Mac client supports Cert-based authentication, Microsoft Modern Authentication, and Multi-Factor Authentication when deployed and enabled. The client has the same requirements as our mobility clients in that you must have an Access Edge Server and Reverse Proxy deployed in a supported configuration. The Skype for Business on Mac client leverages both the Unified Communications Management Platform (UCMP) as well as the Unified Communications Web API (UCWA) that our mobility clients use. Infrastructure requirements for Skype for Business on Mac

These clients are not supported by Skype for Business Server 2019. The Skype for Mac OS X beta software client requires a Macintosh computer with Mac OS X v10.3 or newer, a G3, G4, or G5 processor, a minimum 400 MHz processor, 128 MB RAM, 20 MB free hard drive disk space, sound card, speakers, microphone and an Internet connection. Microsoft Communicator for Mac 2011 (see Communicator for Mac 2011 Deployment Guide) Microsoft Lync for Mac 2011 (see Lync for Mac 2011 Deployment Guide) For details about supported features, see Desktop client feature comparison for Skype for Business. Skype for Business Server 2015 also supports the following legacy clients on computers that are running Mac OS 10.5.8 or latest service pack or release (Intel-based) operating systems (Mac OS 10.9 operating system is not currently supported).

Refer to the System requirements for the minimum hardware required. This list is preliminary and some devices may be qualified for Lync, but not supported on Skype for Business on the Mac.

Skype for mac os x software