What is an enabler and why do I need one?
Rather than create a new version of the system software each time a new machine is released, Apple created system enablers. These enablers contain system software code specific to a particular Macintosh computer. Enablers provide older system software with the information necessary to run properly on a newly released Macintosh. The Macintosh Quadra 605, 610, 650, and 700 computers do not require an enabler when using System 7.5 or later. If you are using System 7.