Meraki Wireless Authentication with SAML Groups

[DillonofAnch17]

Is there a way to configure this without having to use Radius or is Radius a necessity?

[PhilipDAth]

Wireless (not just Meraki) can't use SAML authentication with WPA2-Enterprise mode.  Only RADIUS is supported.

You could potentially do SAML authentication using a splash portal.  I'm not aware of any solutions doing this.