问题

Mac OS下已经安装了Oracle的JDK 1.8版本，点击安装Eclipse-Installer报错。
您需要安装旧 Java SE 6 运行环境才能打开“Eclipse-inst”。

解决办法

1. 右键Eclipse-Installer 显示包内容，找到Info.plist，用文本编辑器打开
2. 找到如下代码

<key>Eclipse</key>
        <array>
            <!-- to use a specific Java version (instead of the platform's default) uncomment one of the following options,
                    or add a VM found via $/usr/libexec/java_home -V
                <string>-vm</string><string>/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Commands/java</string>
                <string>-vm</string><string>/Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home/bin/java</string>
            -->
            <string>-vm</string><string>/Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/bin/java</string>
            <string>-keyring</string>
      <string>~/.eclipse_keyring</string>
        </array>

将-vm一行复制出来，修改Java路径为安装的1.8的路径
保存退出，重新运行Eclipse-Installer