I am trying to make a very simple macOS app. You select a file with a file picker, and below is a text view that you copy output text from. That is just about it. All I need is a selectable text display, and a file picker. It’s a single-view app that’s very simple. Taking both application size and execution speed into account, what is the best macOS framework to write this app? SwiftUI is out of the question because it doesn’t support anything older than 10.15.
What framework should I use? I don’t care about ease of use, I have all the time in the world, taking only performance and executable size into consideration, what should I use, for such a simple quick project?