If asked, enter your password to confirm that you really want to install software.On the Standard Install screen, click Install.Read and accept the software license agreement.
The file is named AppInventor_Setup_v_X.X.dmg where the X.X is the version number.) If you get a message that you cannot install an application from an unidentified developer, control-click the app icon, then choose Open from the shortcut menu.
(You may need to look in your browser's downloads folder. If you previously had the emulator installed, you may need to perform a hard reset. Click the blue link below to begin the download. To get the Android emulator for your Mac, download and install the Setup Package.