Hi @dbates
Maybe I'm missing something, but how come you don't just use Quicken for Mac's built in renaming rules for Payees. I would think that would solve this for you without needing to resort to KM macros. Not that I'm against using KM with Quicken. I have and extensive set of KM macros that I use with Quicken (Quicken 2017 for Mac Macros - #3 by RickO). But this seems to be one case where maybe KM isn't needed.
If you need help with Quicken's renaming rules usage, this forum is probably not the place to discuss that. If so, hop over here and post. I'm a "SuperUser" over there (username RickO) and I'd be glad to help out.