As it concerns the programing idea, I will have to consider that more seriously.
Let me encourage you to go for it. You, as an e-Sword for Mac, can be a major help to those in your part of this community. It may appear to go unrewarded, but knowing the satisfaction one gets purely from having produced something which is really beneficial, not to just oneself, but also to many other Mac users, is something you just can't beat.
Here is a very short list of those who have produced tools to work alongside with e-Sword. And by the way, most of them are not professional software developers.
Last but not least, me.
As I said this is just a short list of people that who develop and have developed tools/utilities for e-Sword. There are a number of others whose names don't appear, but have given a vast amount of time so that many can benefit by using them. Admittedly, all of the tools have been developed to run on Windows. That said, I genuinely don't see why those who are e-Sword for Apple users can't do something like what e-Sword for Windows users have done and do.
Trust this is helpful to you.