What is the best way to build a multi-platform desktop app?

I have an old desktop app build years ago on VB.NET platform. The desktop app sells nice and it has its set of users.
I am planning to re-develop the application from scratch to cover more use-cases and functionality.

I want to build a desktop app that works seamlessly on both Mac as well as Windows. It should be multi-lingual and should be easy to update.

What technology stack should I go with? I have heard about electron.js but I have also heard about it being extremely CPU & memory heavy.