The latest Java
update
from Apple broke JMeter... not sure why but JMeter needs Java 1.5. Add
this line near the top of your jakarta-jmeter-2.X.X/bin/jmeter file
using your handy dandy text editor. I like
TextWrangler.
JAVA_HOME="/System/Library/Frameworks/JavaVM.framework/Versions/1.5"
If you use any of the other jmeter run scripts you may need to add this to them as well.