SPSS 20 is very old (released around 2011) and likely will not run on newer Mac versions like Big Sur, Monterey, or Sonoma [5]. The subscription version is optimized for Apple Silicon (M1/M2/M3) [3].
Instead of a risky torrent, here are safer, more reliable ways to access SPSS: Spss 20 For Mac Torrent
IBM offers a 30-day free trial of the latest version of SPSS Statistics, which is fully compatible with modern macOS [3]. SPSS 20 is very old (released around 2011)