Here's a sobering thought: A full installation of System 7.5 puts 106 control panels and extensions into your System Folder. Trouble is, extension glut is one of the most common causes of Mac glitches, hangs, and crashes.
That’s why, ironically, System 7.5’s 106th extension is an extension manager, which lets you turn selected extensions on or off at start-up. That’s somewhat useful when you’re trying to figure out which extension is causing your crashes, but it’s not good enough when you have 106 possible culprits and 11,236 possible pairs of culprits.
Conflict Catcher II is an extension manager, too. If you press the spacebar as your Mac starts up, you’re shown a list of every extension and control panel in your Mac. At this pause in the Mac’s start-up sequence, you can switch extensions on or off (by clicking); rearrange the loading order (by dragging); view them sorted by type, name, or loading order (using a popup menu); group them into mutually required, or mutually incompatible, clusters (by clicking on a Links button and working in a slightly confusing dialog box); or group them into named subsets.
Conflict Catcher II goes well beyond the basics. For example, if you’re having some mysterious glitch or crash, you click on CC’s Conflict Test button. It asks you to restart the Mac several times. Each time, CC turns off a mathematically calculated subset of extensions, then asks you if the conflict still exists. After a few restarts, CC triumphantly names the problem extension and even offers to turn it off for you. The entire process takes five minutes, and the peace of mind (and subsequent smooth Mac operation) it brings is priceless. CC can even tell you if your problem was caused by the interaction of multiple extensions.
For Power Mac users, CC has an added attraction. Unfortunately, pre-Power Mac, non-native extensions exact a serious overall speed penalty on these machines. CC’s Report function tells you which extensions aren’t written in native code, and even hints at which ones will slow down your Power Mac the most. PowerBook RAM-disk users and network users will also appreciate CC’s ability to load extensions represented on the start-up disk only by their aliases.
CC can also list your fonts and the contents of your Startup Items folder, treating them like extensions that can be switched off, added to groups, and so on.
CC is customizable, fast, and safe (it works by moving tumed-off extensions into a Disabled folder, not by modifying them). There are few certainties in Mac computing, but one is that more extensions and control panels will walk the earth with every passing month. Conflict Catcher II is ready.
Pogue, David. (October 1994). Conflict Catcher II 2.1.1. Macworld. (pg. 71).
Casady & Greene
System
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2019-03-07 / 
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Conflict-Catcher-2-1.2.sit
Emulating this? It could probably run under: 
Basilisk II
