# Install Mesmer Agent: Pull Request Review beta

_Published October 19, 2026_

**By [Sergio Bergmann](https://mesmer.co/resources/author/sergio)**

**Section:** Playbook

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Review pull requests in one place: see what is waiting for your review,
inspect changed files, follow the conversation and work through feedback
without losing your place between browser tabs.

**Mesmer Agent is in beta. Only Pull Request Review is available.**

## Get started in 3 steps

**Desktop or browser**

- [Download for macOS](https://mesmer-desktop-downloads.s3.us-east-1.amazonaws.com/latest/Mesmer-macos-universal.dmg)
- [Download for Windows](https://mesmer-desktop-downloads.s3.us-east-1.amazonaws.com/latest/Mesmer-windows-x64.exe)
- [Download for Linux](https://mesmer-desktop-downloads.s3.us-east-1.amazonaws.com/latest/Mesmer-linux-x64.AppImage)
- [Download the .deb package](https://mesmer-desktop-downloads.s3.us-east-1.amazonaws.com/latest/Mesmer-linux-x64.deb)
- [Try Mesmer Agent in your browser](https://agent.mesmer.co) — no installation needed

1. **Choose where to review.** Download a package above and install it, or try
   Mesmer Agent in your browser without installing anything. On macOS, open the
   DMG and drag the Mesmer app into Applications. On Windows, run the installer.
   On Linux, use the AppImage or the Debian package.
2. **Sign in.** Use the account you already use with your Mesmer organization.
   If you installed the desktop application, open Mesmer Agent and choose to
   log in. Your normal browser opens for sign-in, then returns you to the
   application. Access depends on your account and organization.
3. **Open a pull request.** Select your organization and a request from the
   review queue. If your GitHub account is not connected yet, follow the
   connection prompt before returning to your queue.

## Installation notes

The release provides 4 files: a Mac DMG, Windows installer, Linux AppImage and
Debian package. Choose the one that matches your machine.

| Operating system | Package | Notes |
| --- | --- | --- |
| macOS | DMG | One package for Intel and Apple Silicon Macs. Signed and notarized. |
| Windows | Installer | For 64-bit Windows. Unsigned; Windows may show an unknown-publisher warning. |
| Linux | AppImage or .deb | For 64-bit Linux. The .deb package is for Debian and Ubuntu. |

For an AppImage, mark the downloaded file executable and open it. If your
system cannot run AppImages through FUSE, use the AppImage's extract-and-run
option or install the Debian package where supported. The application uses
your system's webview and needs an internet connection for the hosted review
experience.

## Work through a review

Start with the request's description and discussion to understand what changed.
Open the diff to read the affected files and inspect the changes in context.
Use the review conversation to ask questions about the selected pull request,
then check the changes before sending your review.

Keep the review tied to the request you are looking at: move between files,
read existing comments and add feedback where it helps the author act on it.

## Need help?

If sign-in finishes in the browser but the application is still waiting,
return to Mesmer Agent and try signing in again. If you cannot see the organization
or repository you expect, check that you used the right account and that your
organization has access. For installation problems or review feedback, email
[support@mesmer.co](mailto:support@mesmer.co).

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Canonical: https://mesmer.co/resources/install-mesmer-desktop