今天在mac环境下进行了appium的安装和配置。
1、正确安装nodejs，brew install node
2、使用npm安装appium，npm install -g appium
3、安装appium-doctor，npm install -g appium-doctor
4运行doctor检测，结果为：
info AppiumDoctor ✔ The Node.js binary was found at: /usr/local/bin/node
info AppiumDoctor ✔ Node version is 12.10.0
info AppiumDoctor ✔ Xcode is installed at: /Applications/Xcode.app/Contents/Developer
info AppiumDoctor ✔ Xcode Command Line Tools are installed in: /Applications/Xcode.app/Contents/Developer
info AppiumDoctor ✔ DevToolsSecurity is enabled.
info AppiumDoctor ✔ The Authorization DB is set up properly.
WARN AppiumDoctor ✖ Carthage was NOT found!
info AppiumDoctor ✔ HOME is set to: /Users/blowfire
WARN AppiumDoctor ✖ ANDROID_HOME is NOT set!
WARN AppiumDoctor ✖ JAVA_HOME is NOT set!
WARN AppiumDoctor ✖ adb could not be found because ANDROID_HOME is NOT set!
WARN AppiumDoctor ✖ android could not be found because ANDROID_HOME is NOT set!
WARN AppiumDoctor ✖ emulator could not be found because ANDROID_HOME is NOT set!
WARN AppiumDoctor ✖ Bin directory for $JAVA_HOME is not set
检测结果显示我没有正确的配置ANDROID_HOME和JAVA_HOME，这两个环境是测试android的时候的前置环境，如果你不测试android应用的话可以忽略，否则正确配置即可。
配置完后显示如下：
info AppiumDoctor Appium Doctor v.1.11.1
info AppiumDoctor ### Diagnostic for necessary dependencies starting ###
info AppiumDoctor ✔ The Node.js binary was found at: /usr/local/bin/node
info AppiumDoctor ✔ Node version is 12.10.0
info AppiumDoctor ✔ Xcode is installed at: /Applications/Xcode.app/Contents/Developer
info AppiumDoctor ✔ Xcode Command Line Tools are installed in: /Applications/Xcode.app/Contents/Developer
info AppiumDoctor ✔ DevToolsSecurity is enabled.
info AppiumDoctor ✔ The Authorization DB is set up properly.
WARN AppiumDoctor ✖ Carthage was NOT found!
info AppiumDoctor ✔ HOME is set to: /Users/blowfire
info AppiumDoctor ✔ ANDROID_HOME is set to: /Users/blowfire/Library/Android/sdk
info AppiumDoctor ✔ JAVA_HOME is set to: /Library/Java/JavaVirtualMachines/jdk-12.0.2.jdk/Contents/Home
info AppiumDoctor ✔ adb exists at: /Users/blowfire/Library/Android/sdk/platform-tools/adb
info AppiumDoctor ✔ android exists at: /Users/blowfire/Library/Android/sdk/tools/android
info AppiumDoctor ✔ emulator exists at: /Users/blowfire/Library/Android/sdk/tools/emulator
info AppiumDoctor ✔ Bin directory of $JAVA_HOME is set5、使用appium正常启动，
[Appium] Welcome to Appium v1.14.2
[Appium] Appium REST http interface listener started on 0.0.0.0:4723