CEF was supposed to be more efficient than Electron, but I think that framework heavily missed the mark. I'd be interested to know why the dev chose CEF instead.
I actually use an Electron-like framework to make ClipBook, but it's not Electron and not CEF. It's Electron for C++ developers. It's called Molybden SDK. I'm one of the creators of this SDK. I decided to use it, because I know it really well and it allows me to write using C++ and closely work with the operating system. It's very important when you build a software like ClipBook.
You see the 600MB binary, because it's probably Universal (Apple Silicon + Intel) DMG. To have a smaller size it's better to download DMG for your Mac CPU architecture. You can find all three versions at https://clipbook.app/download/
I should say that even Apple Silicon or Intel app will still be ~330MB. It's because of the SDK I use to build this app.
I'm not hiding and you can easily find me in social networks: - LinkedIn: https://www.linkedin.com/in/vladimir-ikryanov-9334915/ - GitHub: https://github.com/vladimir-ikryanov
I will definitely need to share the source code of ClipBook, so anybody can analyze it or build their own copy of the app.