2.) On the page in the previous step, click the download for Macintosh link, also make note of or copy the authorization code located on the page. This code will be used later to activate your copy of SPSS please write it down or leave the webpage open for later use.
3.) Navigate to your downloads folder or the downloads list in Safari. There you will find the.dmg file of the SPSS install. Open the DMG, and then once the DMG is open run the Installer app.
It may take awhile to open and verify; do not click on anything while it is doing this. The app will then prompt if you want to open it. 4.) If the installer does not open (if it did move to the next step) navigate to System Preferences, and the 'Security & Privacy' preference pane. There you will need to adjust the gatekeeper settings to allow from anywhere.