Microsoft Skype for Business clients are available for multiple platforms. Select the platform that is right for you. Following are the available clients for Microsoft Windows and Mac OS X systems.
Microsoft Windows
If you are using Microsoft Office or Microsoft Office 365, you may already have a Skype for Business or Lync application installed. If you do not have Office installed, download the appropriate application for your system:
Microsoft Skype for Business Basic for Windows
Mac OS
If you are using Microsoft Office for Mac or Microsoft Office 365, you may already have Skype for Business installed. If you do not have Office installed, download the Skype Basic Client for MacOS