I'm on Linux.

I press F11, select the region and click and then Ctrl-V paste the image into Claude or Codex CLI.

Does this not work on macOS?

There may be a mode to do this using the existing screen capture, I have not tried all the combinations, normally it saves either the entire screen or a region based on the key combo, but as far as I have tested does not copy to the clipboard or autopaste.

So you solved a problem you didn't first confirm you factually had. :D

I googled "capture screen region on macos".

TLDR; works on macOS (you set it to capture to clipboard instead of PNG). And then press Cmd+V in your LLM CLI ...

> So you solved a problem you didn't first confirm you factually had. :D

Claude did actually :)

> (you set it to capture to clipboard instead of PNG)

What is the key combination to do this? and have it auto paste into the right terminal window I was in?

Macs have configurable global shortcuts for copying screen or selected areas directly to the clipboard which you can then paste directly into CC.

Or use this and have it done automatically :)