When I was trying to launch Arduino 16 on my MacBook I received an error:
Cannot launch Java application
Uncaught exception in main method:
java.lang. Unsatisfied LinkError:/Applications/
arduino-0016/Arduino 16.app/Contents/Resources/
java/librxtxSerial.jnilib: no suitable image found.
Did find: /Applications/arduino-0016/Arduino
16.app/Contents/Resources/Java/librxtxSerail.jnilib:
No matching architecture in universalwrapper.
After searching around, I found out all that needs to be done is control+click Arduino16.app and select "Get Info". Enable "Open in 32 Bit Mode" and everything should be good to go.