On a mac you can just use a hotkey to talk to an agentic CLI. It needs to be a bit more polished still IMO, like removing the hotkey requirement, with a voice command to break the agents current task.
I believe it does on newer macs (m4 has neural engine). It's not perfect, but I'm using it without issue. I suspect it'll get better each generation as Apple leans more into their AI offering.
There are also third parties like Wispr that I haven't tried, but might do a better job? No idea.
The mac one is pretty limited. I paid for a similar tool as above and the LLM backing makes the output so much better. All my industry specific jargon gets captured perfectly whereas the Apple dictation just made up nonsense.
I find the generic ones like the ones I can use anywhere on Mac to be crap.
If you've used the ChatGPT voice to text model you know what I mean.