SPSS MacOS Licensing
Navigate to your "Applications" folder in "Finder" by clicking on the desktop, and pressing keys Command + N.

Picture
Navigate to directory "IBM/SPSS/Statistics/26" and double click file "SPSS Statistics License Authorization Wizard" to start the licensing wizard.
Picture
Click "Next".
Picture
Check radio button "Autorized user license ..." followed by "Next".
Picture
Enter the license code from your email followed by "Next".
Picture
On the next page you'll see the button "Finish". That completes the installation.