What UI framework are you using? The headline says native, but the toolbar looks unusual for a Mac app.
I really liked the animated transition into a list after you dropped the zip file!
I'm using SwiftUI + AppKit in XCode to make the app. The toolbar is just a row of big native buttons :D. I initially designed it to be familiar to Windows users & 7-Zip. But, after actually playing with 7-Zip recently, I think it can be unintuitive at times (ex. the extract/copy/move buttons can all unarchive and the button to create an archive is labeled "Add"), so I plan to modify it. I'm also planning on adding customization options to move these buttons to the native macOS toolbar so it can fit in better with the macOS design langauge.
Thanks I spent quite some time playing around with that animation! It is also fully coded in SwiftUI.
GitHub allows private repos, proprietary licenses, and releases explicitly allow publishing a binary, so, why not use github? it's free.
I think the easiest to follow explanation of the requirements for this case is https://softwareengineering.stackexchange.com/a/86146/332347
Native can mean many things, like "not a web-app".