DoubleTake for Mac 2.6.8
DoubleTake is the "nano" of stitching software. Drag & drop your images onto or into DoubleTake, arrange them, and check the overlaps.
source https://www.techspot.com/downloads/3098-doubletake-for-mac.html
source https://www.techspot.com/downloads/3098-doubletake-for-mac.html