I’m posting this because I always spend half-an-hour trying to find this information. To set up virtual mappings or virtual directories (what I call them) for ColdFusion on JRun on OSX, edit the jrun-web.xml file in (this is where mine was, you may have to look elsewhere):
/Applications/JRun4/servers/cfusion/cfusion-ear/cfusion-war/WEB-INF/jrun-web.xml
Add an entry to the jrun-web-app xml element like this…
<jrun-web-app> <!-- ... --> <virtual-mapping> <resource-path>/virtualdir/*</resource-path> <system-path>/physical/path/</system-path> </virtual-mapping> <!-- ... --> </jrun-web-app>