1、使用Android studio 下載安裝SDK 需要配置環境變數

open .bash_profile

export ANDROID_HOME=/Users/使用者名稱/Library/Android/sdk 
export PATH=${PATH}:${ANDROID_HOME}/tools
export PATH=${PATH}:${ANDROID_HOME}/platform-tools

2、只下載SDK

按照上面的設定環境變數

3、利用brew 下載adb

brew cask install android-platform-tools

Mac系統下Java環境變數

PATH後面加${PATH}

# Setting PATH for Python 3.6
# The original version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.6/bin:${PATH}"
export PATH
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home


export CLASSPAHT=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar


export PATH=${PATH}:$JAVA_HOME/bin:$PATH


export ANDROID_HOME=/Users/xiaoyezi/Library/Android/sdk 
export PATH=${PATH}:${ANDROID_HOME}/tools
export PATH=${PATH}:${ANDROID_HOME}/platform-tools
export APPIUM_HOME=/Applications/Appium.app/Contents/Resources


export JAVA_HOME
export PATH
export CLASSPATH