Find your version of SPSS (either 18 or 19).

Install the required version of R for your version of R from the following links:

• SPSS 18: R 2.8
• SPSS 19: R 2.10
• SPSS 20: R 2.12
• SPSS 21: R 2.14

Download and install the SPSS-R Plugin. Load the dmg file and run the included installer. Choose from your operating system and version of SPSS:

• SPSS-R Plugin 18
• SPSS-R Plugin 19 - These are direct links to zip files. Simply unzip them and run the installer. 
• SPSS-R Plugin 20 - These are direct links to zip files. Simply unzip them and run the installer. 
• SPSS-R Plugin 21 - These are direct links to zip files. Simply unzip them and run the installer. 

Download the SPSS-Python Plugin. Load the dmg file and run the included installer. Choose from your operating system and version of SPSS:

• SPSS 18 Python Plugin
• SPSS 19 Python Plugin
• SPSS 20 Python Plugin
• SPSS 21 Python Plugin - This is a direct links to zip files. Simply unzip them and run the installer. 

Download the CEM for SPSS extension bundle:

• CEM Extension Bundle

Open SPSS, go to "Utilities > Extension Bundles > Install Extension Bundle..." and direct the dialog box to the "cem.spe" file you downloaded.

Restart SPSS and you should see a "CEM" command under "Analyze":