mac oracle sql developer 4.1 打不开问题

oracle官网下的 sqldeveloper-4.1.2.20.64-macosx.app 打不开, 网上说要改java home, 但我的环境变量已经有java home了

> echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home

> /usr/libexec/java_home -v 1.8
Unable to find any JVMs matching version "1.8".
/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home

查看安装内容:

sqldeveloper.sh中

#!/bin/bash 
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

升级jdk 1.8后正常启动