我正在尝试在终端上运行 Appium 1.6.3，以便可以在 iOS 模拟器上运行 Appium。过去，我可以在终端上启动 Appium。自从我将 mac OS 升级到 10.12.3 后，我在尝试运行它时总是收到以下错误：
-bash: appium: command not found
当我尝试运行 appium-doctor 时，通常会得到以下诊断：
info AppiumDoctor Appium Doctor v.1.3.0
info AppiumDoctor ### Diagnostic starting ###
info AppiumDoctor ✔ The Node.js binary was found at: /usr/local/bin/node
info AppiumDoctor ✔ Node version is 6.9.4
info AppiumDoctor ✔ Xcode is installed at: /Applications/Xcode.app/Contents/Developer
WARN AppiumDoctor ✖ Xcode Command Line Tools are NOT installed!
WARN AppiumDoctor ✖ DevToolsSecurity is NOT enabled!
info AppiumDoctor ✔ The Authorization DB is set up properly.
info AppiumDoctor ✔ Carthage was found at: /usr/local/bin/carthage
info AppiumDoctor ✔ HOME is set to: /Users/jakerushing
info AppiumDoctor ✔ ANDROID_HOME is set to: /Users/jakerushing/Library/Android/sdk
info AppiumDoctor ✔ JAVA_HOME is set to: /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home
info AppiumDoctor ✔ adb exists at: /Users/jakerushing/Library/Android/sdk/platform-tools/adb
info AppiumDoctor ✔ android exists at: /Users/jakerushing/Library/Android/sdk/tools/android
info AppiumDoctor ✔ emulator exists at: /Users/jakerushing/Library/Android/sdk/tools/emulator
info AppiumDoctor ✔ Bin directory of $JAVA_HOME is set
info AppiumDoctor ### Diagnostic completed, 2 fixes needed. ###
当我尝试运行时xcode-select --install，我收到错误消息，指出工具已安装，并且 DevToolsSecurity 已启用。我尝试卸载 XCode 命令工具并重新安装，但这并没有解决问题。我试图解决这个问题几天，但我找不到这些问题的任何答案。我对这个问题束手无策。
非常感谢任何输入。