My apologies, it was on the Mac OS X TeX mailing list.

My question was whether one could use a TeX-oriented editor in lieu of VS Code --- would this be a reasonable option, or, do the advantages/capabilities conferred by VS Code make it something which pretty much require its use?

I'm trying to work up an environment for a largish project which I'm currently doing on Gitbook:

https://willadams.gitbook.io/design-into-3d/

and I'm just not finding any tools which are a good fit yet, and when I move, I'd like to have a bit of familiarity to begin, and TeXshop is one tool in this space which I am familiar with.