Work through a repository with the ChatGPT account you already have open.

Nix is a macOS workspace that holds projects, threads, tool activity, and approvals in one window. A Chrome extension you load yourself drives your signed-in ChatGPT tab, so there is no API key to paste and no second account to create.

Download for macOS Get the Chrome bridge

Checking the latest release

How a message reaches the model

Your repository A folder you open from the app
Nix Threads, tool activity, approvals
Chrome bridge An extension you load yourself
chatgpt.com The tab you are already signed in to

The first three steps run on your Mac. Only the last one is a network session, and it is the one you are already signed in to. Nix stores no model credentials of its own.

One workspace instead of a browser tab and a terminal

Work stays grouped the way the repository is already grouped, and anything that needs a decision arrives where you are reading.

Projects stay projects

Threads belong to a repository, with their own folder, history, active state, and unread status.

Tool activity reads as work

Related commands collect beneath one activity label, and raw output stays one click away instead of filling the transcript.

Approvals interrupt once

An action that changes the workspace turns the composer into a review surface, so approving does not mean leaving the conversation.

What you download

Both pieces ship from the same tagged release. This page resolves the rows below against the newest GitHub Release, so they describe the build you will actually get.

Downloads in the latest Nix release, with format, size, and requirement.
Component	Format	Size	Requirement
Nix for macOS	Universal .dmg	Resolving	macOS 11 or later, Apple silicon or Intel
Chrome bridge	Unpacked .zip	Resolving	Chrome with developer mode enabled

The macOS build is signed, notarized, and universal. Sizes come from the release assets when the page loads.

Install once, then let it update

Three steps, and then Nix checks for new releases in the background. A downloaded update installs on the next restart, and its status stays visible in Settings.

Step 1

Move Nix into Applications

Open the DMG and drag the app across.

Step 2

Load the Chrome bridge

Unpack the ZIP, open chrome://extensions, turn on developer mode, and load the unpacked folder.

Step 3

Open a repository

Sign in to ChatGPT in that Chrome profile, pick a folder in Nix, and start a thread.

Start with the repository you have open right now

The download is the whole evaluation. Install it, point it at a folder, and see whether the workspace holds up on real work.

Download for macOS

Alpha. The workspace, the bridge protocol, and the release layout can still change between versions.