Just downloaded arduino software on my mac. Running 10.5.7. When I double-click on Arduino icon I get error message: Cannot launch Java application. Uncaught exception in main method: java.lang.UnsatisfiedLinkError: (then location of arduino file on my computer)/Contents/Resources/Java/librxtxSerial.jnilib: no suitable image found. Did find: (file location on my computer)/Contents/Resources/Java/librxtxSerial.jnilib: no matching architecture in universal wrapper.
This was the newest version: Arduino 16. Also tried Arduino 15 with same result.
Thank you so much.