Codex remote from different machine

Codex
1

I’m trying to connect to my Codex on my Mac Studio.

I can do this without any problem using Codex for mobile, on iPhone

But from my Laptop there does not seem to be a way. My Studio in on Tahoe OS26, whereas my Laptop is on Monterey OS12, I wondered if that could be the reason?

2

Welcome to the community!

According to docs, it should be possible to connect multiple hosts and switch between connected hosts and threads, so having your Mac Studio already connected to your iPhone should not by itself prevent you from adding the laptop.

A few things worth checking on the laptop:

  • Is the latest Codex app installed and running?
  • Do you see the “Set up Codex mobile” option in the Codex app?
  • Are the laptop, Mac Studio and iPhone signed into the same ChatGPT account and workspace?
  • Is the laptop awake, online and running Codex when you try to connect?

So I would check whether the latest Codex app installs and whether the mobile setup option appears.

3

Thanks. I checked those.

  • Both machines are running the latest Codex app I can see: 26.609.41114, released Jun 12 2026.

  • Both are signed into the same ChatGPT account/workspace.

  • The Mac Studio is awake, online, running Codex, and remote access is enabled.

  • iPhone → Mac Studio works.

  • Laptop → Mac Studio appears to connect in Settings.

The issue is more specific:

On the laptop, Settings shows Mac-Studio.mynet with a green connected dot, and I can view Mac Studio-specific settings. So the remote connection seems to work inside Settings.

But when I click Back to app, new chats still run locally on the laptop, not on the Mac Studio.

I tested by selecting Mac-Studio.mynet, going Back to app, starting a new chat, and asking Codex to run:

hostname
sw_vers
pwd

It returned:

Brians-Air.mynet
ProductName: macOS
ProductVersion: 12.7.6
BuildVersion: 21H1320

So despite the Mac Studio being selected in Settings, the main chat runtime is still the laptop.

Setup:

Client: MacBook Air, macOS Monterey 12.7.6
Host: Mac Studio, macOS Tahoe / 26
Both: Codex 26.609.41114

So I’m wondering if the host selection is not being carried from Settings back into the main chat UI, possibly because the client is on macOS 12.

4

Ah, thank you for clarifying!

Remote Control is for device authorization and controlling a supported device (for example, an iPhone controlling the host), whereas desktop-to-desktop remote project access is through an SSH connection.

So I’d recommend try to connect Mac Studio and MacBook Air through SSH and see if that would work.

5

Great, thanks a lot for confirming!