How to downgrade to an older version of skype for mac. Multi skype launcher enables you to launch two or several skype accounts at the same time. Download skype for business on mac from official microsoft. Just click the free multi skype launcher download button at. Whatsapp is free and offers simple, secure, reliable messaging and calling, available on phones all over the world. How to download and install skype for mac lifewire. For the best mac client experiences and an always uptodate infrastructure, we recommend all customers migrate to office 365. In addition to user name and password, you can require additional authentication methods, such as smart cards or pins, to authenticate users who are joining from external networks when they sign in to skype for business meetings. You can also create a meeting directly from the web.