It's a little annoying, but I was able to get it to load by going into the installation path
/Applications/Apache Flex/ Then right-clicking > Show Package Contents Then navigate to the executable and it will load: /Contents/MacOS/Apache Flex SDK Installer -- View this message in context: http://apache-flex-users.2333346.n4.nabble.com/failed-to-run-installer-3-2-on-my-Mac-OS-Sierra-tp14607p15740.html Sent from the Apache Flex Users mailing list archive at Nabble.com.