You can download SPSS free of charge as long as it is required for your program. You will be able to access SPSS as soon as you are enrolled in a course that requires it.
However, version 23.0 may be necessary if your computer is running Windows 10, OS X Mountain Lion 10.8, OS X Mavericks 10.9, OS X Yosemite 10.10, or OS X El Capitan 10.11. If you are in need of the latest version SPSS, version 23.0, you may download it by following the Windows instructions or Macintosh instructions.
SPSS version 24 is available for students using the newly released Mac OS Sierra. Learn more on how to download and license version 24.0.