OSX Sonoma and synapse?

Nope, DA Elite is Synapse 3 compatible, which is not supported on mac os.

You can try using 3rd party app: Razer macOS: https://github.com/1kc/razer-macos/releases - not all functions are configurable, but it’s better than nothing.

So far the best software I have seen where you can still remap keys etc is:

https://karabiner-elements.pqrs.org/

Do you know if there is a same software for headset ? 

I don’t know why razer still put mac ok on package, that”s not true….. 

Nope. Razer has ditched Mac users and only focuses on Windows. If you’re looking for decent Mac support, Corsair is the best while Logitech has accelerated its development for G-Hub on Mac (shame though that their top wireless mice don’t provide BT connectivity in addition to their proprietary protocol)