Hi, Yes, you can create a CIN on Mac OS X. You can find more information on it in the <a href="http://digital.ni.com/manuals.nsf/websearch/8D930295FFBF9F7686256D2C00624728?OpenDocument&node=132100_US">Using External Code in LabVIEW</a> manual pages 3-10 to 3-12.
I hope this helps. Feroz National Instruments