After upgraded to Safari 12, Citrix Workspace App and Citrix Receiver do not start *.ica files any more.
To correct this problem, you need to change the web.config on all Storefront servers.
For StoreFront deployments, modify web.config under the Receiver for Web (RfWeb) site (typically C:\inetpub\wwwroot\Citrix\StoreWeb) to activate the Citrix Receiver Launcher / Citrix Workspace App Launcher for Safari 12 and later.
1. Open web.config using your preferred text editor and locate the line : <protocolHandler enabled=”true” platforms=”(Macintosh|Windows NT).*((Firefox/((5[2-9]|[0-9])|\d\d\d))|(Chrome/((4[2-9]|[0-9])|\d\d\d)))” skipDoubleHopCheckWhenDisabled=”false” />
2. The value of the platforms attribute is a regular expression specifying the browsers that Citrix Receiver Launcher is used for client detection and HDX launches. Change the regular expression to:
3. This will add Safari 12 and later to the list of browsers that Citrix Receiver Launcher will be used.