In answer to your question, if you are using the older MAC version, with 5.0 and it asks you to covert, just press cancel. The code will work fine.
You can upgrade to the latest version of the MAC that supports 5.0 by downloading the BeeKit. This is a GUI configuration program that contains the SMAC and MAC software.
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=BEEKIT_WIRELESS_CONNECTIVITY_TOOLKIT&...Regards,
Nina