You may install the WicedWiFi SDK to .../WicedWiFi directory including the eclipse and source. Install the WicedSmart SDK to .../WicedSmart including the eclipse and source. I do not have a MacOS to test it but it should not be any different from Windows or Linux installations.
Another option, install one of the SDK, Wifi or Smart. Then bring the other SDKs source to the installed SDK.
Here it is installed the WiFi SDK then brought the Smart SDK source.
You may take a look at How to bring a WICED SDK into Eclipse for reference as well.
Hope it helps.