How to Set Up Claude Cowork on Mac & PC (Beginner's Guide)

Claude Cowork is the desktop companion that lets Anthropic's Claude read, write, and run code inside a folder on your own computer. For a service business owner that translates into a real assistant that can clean spreadsheets, edit your website copy, draft proposals against your real data, and reorganize the messy folder of pricing files you have been meaning to fix for two years.

This guide walks the install from a blank machine, on both macOS and Windows. We assume you have never touched a terminal. By the end you will have Cowork connected to a folder, you will run your first task, and you will know the three mistakes that lock most beginners out on day one.

Claude Cowork is a Claude experience packaged for your desktop. Think of it as Claude with hands. The chat app you may have used in a browser can only look at files you paste in. Cowork can actually open the folder, edit a file in place, save it back, and show you the diff. That sounds small. It is not. It collapses a hundred copy-paste loops into a single conversation.

We recommend it to service-business owners who are sitting on a pile of unloved digital work: a price book that lives in three spreadsheets, intake forms that need standardizing, a years-old website folder that has never been cleaned up, a stack of PDFs nobody has summarized. Cowork is also a strong fit for office managers who want a real teammate for the documentation and clean-up work that always slips to the bottom of the list.

It is not the right tool for: live customer chat, voice answering, or anything that needs to run unattended on a schedule. For those, see our AI receptionist and voice agent service and our missed-call text-back setup guide.

• A Mac running macOS 13 or newer, or a Windows 10 or 11 PC. Older versions work in some cases but are not officially supported.
• An Anthropic account with a paid plan. The free tier does not include Cowork.
• About 1 GB of free disk space for the installer and supporting components.
• Administrator rights on the machine. You will be asked to approve the install.
• A folder you actually want Claude to work in. Make a new one called cowork-sandbox on your Desktop for your first run. Do not point Cowork at your entire Documents folder on day one.

Two minutes of prep here saves an hour later. Pick the one project you would most like a smart assistant to clean up, and copy those files into the sandbox folder before you install.

1. Download the installer. Sign in at claude.ai, open the Cowork section in your account, and click the macOS download. You will get a file ending in .dmg.
2. Open the disk image. Double-click the downloaded file. A small window opens with the Claude Cowork app icon and an Applications folder shortcut.
3. Drag to install. Drag the Claude Cowork icon onto the Applications folder shortcut. Wait for the copy to finish. Then eject the disk image from your desktop or Finder sidebar.
4. First launch. Open Launchpad and click Claude Cowork. macOS will ask you to confirm because it was downloaded from the internet. Click Open.
5. Sign in. Use the same Anthropic account you used to download. A browser tab will open, you approve the connection, then you are bounced back to the app.
6. Grant folder access. Cowork will ask for permission to read and write a folder. Pick your cowork-sandbox folder. macOS will pop a second permission prompt the first time it actually writes a file. Approve it.
7. Confirm it works. Type a quick instruction in the chat: "List the files in this folder and tell me what they look like." Cowork should show a tool call, read the folder, and reply with a summary.

1. Download the installer. From your Anthropic account, click the Windows download. You will get a file ending in .exe (or .msi).
2. Run the installer. Double-click the file. Windows SmartScreen may warn you because the file is new on your machine. Click More info then Run anyway. Approve the User Account Control prompt.
3. Choose install location. Accept the default unless you have a reason to change it. Click Install and wait for the bar to finish.
4. Launch from Start. Press the Windows key, type Claude Cowork, and open it.
5. Sign in. Use your Anthropic credentials. Your browser will pop open, you approve, then control returns to the app.
6. Pick a folder. Click the folder icon in the sidebar and select your cowork-sandbox folder on the Desktop. Windows will not show a second permission prompt; the first approval is enough.
7. Confirm it works. Send a test instruction: "Open the folder and tell me what is in it." You should see a tool call and a written summary.

A good first task is something small that you can verify by eye. Try one of these:

• Drop three messy customer-list spreadsheets into the folder and ask Cowork to combine them into a single deduped CSV with consistent column names.
• Paste your last five proposals as PDFs and ask for a one-page comparison table of price, scope, and timeline.
• Drop your service descriptions in a text file and ask Cowork to rewrite each one in plain English for a homeowner audience.

When Cowork proposes an edit, it shows you the change before saving. Read it. Approve. The point of running on your machine is that you stay in the loop.

Once you are comfortable, graduate to a real folder, but keep it scoped. A single project folder is the right unit. Do not point Cowork at your whole hard drive.

• Pointing it at your entire Documents folder on day one. Too much context, too many surprises. Start with a sandbox folder.
• Skipping the macOS second permission prompt. If your first write silently fails, that is almost always why. Open System Settings, Privacy & Security, Files & Folders, and make sure Claude Cowork has access to the folder.
• Treating it like Google. Cowork is best when you give it a small, real task and the files it needs. One-liners with no context produce one-liner answers.
• Not reading the diff before approving. The whole point of running local is that nothing changes without your eyes on it. Keep that habit.

Once Cowork is installed, the next question is whether you should also install Codex. Compare the two in our Claude Cowork vs Codex guide. If you would rather skip the trial-and-error and have us set everything up live with you, the Claude Cowork setup class is the done-with-you upgrade to this guide, or join the broader AI Setup Class to pick between tools live.