- Download the "spm12" zip file, and unzip it on your local. (make sure to download the version compatible with your MATLAB version release)
- Download the "cat12_latest.zip" file, and unzip it. Now move the unzipped folder of "cat12" to "spm12/toolbox" folder.
- In MATLAB, add the "spm12" folder and subfolders to path.
- Launch the "spm12" from the MATLAB command window("spm fmri" should do it).
- Click on "Segment", from the "spm12" menu, as shown below
- This will open "Batch Editor" window. Now select the "CAT12: segmentation" tool as shown in the below figure
- This will add a module "CAT12: Segmentation" to the Module List. Select it, and you will be able to find the "Split job into seperate processes" as shown in the below figure.