如题，我的安装是正常的，node、nam、appium 的安装都是正常的，也能正常查看版本号

SvenWengdeMBP:~ svenweng$ node -v
v0.10.34
SvenWengdeMBP:~ svenweng$ npm -v
1.4.28
SvenWengdeMBP:~ svenweng$ appium -v
1.4.16

执行 appium-doctor 显示的也是正确的

SvenWengdeMBP:~ svenweng$ appium-doctor
Running iOS Checks
✔ Xcode is installed at /Applications/Xcode.app/Contents/Developer
✔ Xcode Command Line Tools are installed.
✔ DevToolsSecurity is enabled.
✔ The Authorization DB is set up properly.
✔ Node binary found at /usr/local/bin/node
✔ iOS Checks were successful.

Running Android Checks
✔ ANDROID_HOME is set to "/Users/svenweng/Desktop/Application/adt-bundle-mac-x86_64-20131030/sdk"
✔ JAVA_HOME is set to "/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home."
✔ ADB exists at /Users/svenweng/Desktop/Application/adt-bundle-mac-x86_64-20131030/sdk/platform-tools/adb
✔ Android exists at /Users/svenweng/Desktop/Application/adt-bundle-mac-x86_64-20131030/sdk/tools/android
✔ Emulator exists at /Users/svenweng/Desktop/Application/adt-bundle-mac-x86_64-20131030/sdk/tools/emulator
✔ Android Checks were successful.

✔ All Checks were successful

但是我执行 appium 的时候就报了好多好多的错误，跪求大神给科普一下到底是啥原因啊！
*** 工具正常了，我进入了命令行提示的错误网址
网址上显示的是这个
Error: fn must be a function

This page is here for the sake of completeness. There really is nothing much to add on that error.
翻译过来就是：
错误： FN 必须是一个函数

这页是这里为了完整性。真的是没有什么补充该错误。

折腾了一天，终于把问题搞定了，问题的原因是因为 node 的版本太旧了导致的，原因分析在1 楼回答的那个链接上，再说说今天自己折腾过程中遇到的问题吧，我在网上搜索帖子的时候说需要吧 node 卸载了才能升级（我真是天真）。于是按照步骤手贱删除了一些不应该删除的东西，结果搞的很乱，思路都乱了，不知道从何下手。于是我就去睡了一觉，醒来重新折腾，重新去官网下了一个 node 的安装包，把之前干掉的 node 环境重新部署好。再使用 npm install -g appium 的时候，一直会出现这个问题

SvenWengdeMBP:~ svenweng$ npm install -g appium
npm ERR! tar.unpack unzip error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-10484-941ff227/registry.npmjs.org/appium-uiauto/-/appium-uiauto-1.10.10.tgz
npm ERR! tar.unpack unzip error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-10484-941ff227/registry.npmjs.org/appium-instruments/-/appium-instruments-2.0.6.tgz
loadRequestedDeps → netwo ▐ ╢███████████████████████████████░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░╟
^C
SvenWengdeMBP:~ svenweng$ sudo chmod -r 777 /usr/local
Password:
chmod: 777: No such file or directory
SvenWengdeMBP:~ svenweng$ sudo chmod -R 777 /usr/local
SvenWengdeMBP:~ svenweng$ npm install -g appium
loadRequestedDeps → netwo ▄ ╢███████████████████████████████░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░╟
^C
SvenWengdeMBP:~ svenweng$ npm install -g appium
npm ERR! tar.unpack unzip error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-13599-e762bf07/registry.npmjs.org/hoek/-/hoek-2.16.3.tgz
npm ERR! tar.unpack untar error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-13599-e762bf07/registry.npmjs.org/hoek/-/hoek-2.16.3.tgz
npm ERR! tar.unpack unzip error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-13599-e762bf07/registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.8.tgz
npm ERR! tar.unpack untar error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-13599-e762bf07/registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.8.tgz
npm ERR! tar.unpack unzip error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-13599-e762bf07/registry.npmjs.org/core-js/-/core-js-0.9.18.tgz
npm ERR! tar.unpack unzip error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-13599-e762bf07/registry.npmjs.org/appium-adb/-/appium-adb-1.7.5.tgz
npm ERR! tar.unpack unzip error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-13599-e762bf07/registry.npmjs.org/appium-instruments/-/appium-instruments-2.0.6.tgz
npm ERR! tar.unpack unzip error /var/folders/hm/04tcnt812v909nysd8jgl0100000gn/T/npm-13599-e762bf07/registry.npmjs.org/appium-uiauto/-/appium-uiauto-1.10.10.tgz
npm ERR! Darwin 15.0.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "-g" "appium"
npm ERR! node v5.1.0
npm ERR! npm v3.3.12
npm ERR! code Z_BUF_ERROR
npm ERR! errno -5

npm ERR! unexpected end of file
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR! https://github.com/npm/npm/issues

npm ERR! Please include the following file with any support request:
npm ERR! /Users/svenweng/npm-debug.log

每次安装到一半都安装不下去，我的电脑也是 *** 的，按道理应该也都能下载才对，具体详细的原因请恕我是小白，不太懂这个。不过我换了一个下载源就把这个问题搞定了，这里发出来，希望下次有遇到这种问题的朋友不会在这个地方浪费太多时间。命令是这个：npm -g --registry http://registry.cnpmjs.org install appium

前前后后折腾了差不多一周的环境，终于把环境的问题搞定了，希望能够更深入的学习，也给自己一个勉励。