If you don’t have a Mac I don’t think you can get the MacOS SDK.

So in that case I’d recommend Rust. I still think most of Rust’s tools/frameworks need more time in the oven but Rust is massive and has tools being built for everything. If you want Mobile I’d recommend you take a look at Dioxus or Tauri. There are probably others as well but I don’t know them it’s been a while since I’ve looked.