Installs on macOS but then "zsh: command not found: codex"

Hi,

First off: thanks!

I just installed codex on my mac ( Sequoia 15.3.2 (24D81) with
yarn global add @openai/codex

Which gives me :
`yarn global v1.22.22
[1/4] 🔍 Resolving packages...
[2/4] 🚚 Fetching packages...
[3/4] 🔗 Linking dependencies...
warning Workspaces can only be enabled in private projects.
[4/4] 🔨 Building fresh packages...
success Installed "@openai/codex@0.1.4161006" with binaries:

• codex

✨ Done in 0.97s.
`

But when i try to run codex in the terminal, all I get is :
zsh: command not found: codex

Am I doing anything wrong?

Thank you