Windows,C:Users<username>AppDataRoamingUnityAsset Store
Mac OS X,~/Library/Unity/Asset Store
/Applications/Unity/Standard Packages/
/Users/Shared/Unity/Unity (Demo 路径)
/Users/Shared/Unity/Unity
/Users/Shared/Unity/Unity
/Applications/Unity/Standard Packages/
/Applications/Unity/Standard Packages/
/Applications/Unity/Standard Packages/