Citrix SSL Error 61 - Where to store Cert

I need to know where to store a Cert so that the Citrix Receiver for Mac (latest version, 11.4) can read it. It's a known issue that Citrx iCA Client on the Mac and some other Linux-based OS does not reliably read the root certificate store in teh OS, teh workround is to store a copy of teh cert .. somewhere. Question is, on OSX 10.7, where would that be?