java7仅有64位版, Chome不支持64位Java. 可通过切换回系统自带的java6解决. 每次升级Java后执行一遍此脚本. 重新安装java即能升级到java7

switch_java6.sh

#!/bin/bash

[[ -d /Library/Internet\ Plug-Ins/disabled ]] || sudo mkdir -p /Library/Internet\ Plug-Ins/disabled
sudo rm -rf /Library/Internet\ Plug-Ins/disabled/JavaAppletPlugin.plugin
sudo mv /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin /Library/Internet\ Plug-Ins/disabled
sudo ln -sf /System/Library/Java/Support/Deploy.bundle/Contents/Resources/JavaPlugin2_NPAPI.plugin /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
sudo ln -sf /System/Library/Frameworks/JavaVM.framework/Commands/javaws /usr/bin/javaws
echo "Switched to Java6, exit"