First, you need to install Eclipse first by following this site:
http://developer.apple.com/tools/eclipse.html
Second, you need to install Android SDK from this link:
http://developer.android.com/sdk/installing.html
Third, you need to install ADT (Andoid Drevelopment Tools) from this link:
http://developer.android.com/sdk/eclipse-adt.html
Finally, go to SDK directory installation from Terminal. Then goto tools directory and run below “android update sdk”
aoddy$ pwd
/Users/aoddy/android-sdk-mac_86/tools
aoddy$ android update sdk
If you don’t run this command, you cannot see a list of SDK tarket.
Software for develop Android on Mac.