4.1 Bug Sniffer was written to help sort out the problems caused by System 4.1’s use of the BasicGlob low memory global. This is especially true of Megamax C applications - they all seem to do this, and they all break.
4.1 Bug Sniffer will inspect all applications on the selected volume, trying to determine if any of them are Megamax-compiled. It does this by looking for the “move.l A4, BasicGlob” sequence that seems to be at the head of all Megamax applications. It also reports on the number of $02B6 hex matches in the CODE segments - in case any are BasicGlob references.