Install Claude Code and Get Through Your First 30 Minutes
The current install command for Mac and Windows, the plan you actually need, and what to do in the first half hour so Claude knows your business.
A lot of Claude Code tutorials still start with installing Node and fighting npm permissions. You can skip all of that now. Anthropic ships a one-line installer, and it updates itself.
Claude Code is different from the chat window at claude.ai. It runs in your terminal, inside a folder on your computer, and it can read and write the files in that folder. That’s the whole reason to use it.
Step 1: Get the right plan
Claude Code needs a paid account: Pro, Max, Team or Enterprise (or API credits through the Claude Console). The free claude.ai plan does not include it. Pro is where I’d start.
Step 2: Install it
On a Mac, open Terminal (Cmd + Space, type Terminal) and paste:
curl -fsSL https://claude.ai/install.sh | bash
On Windows, open PowerShell and paste:
irm https://claude.ai/install.ps1 | iex
If you already use Homebrew, brew install --cask claude-code works too, but that version won’t update itself. The native installer does.
Close the terminal, open a new one, and check it:
claude --version
claude doctor
A version number means you’re installed. claude doctor tells you what’s off when something is, which beats guessing. On Windows, Git for Windows is optional, but installing it gives Claude a Bash shell to work with.
Step 3: Give it a folder
Make one folder where your business work lives, and always start Claude from inside it.
mkdir ~/Claude
cd ~/Claude
claude
The first run opens your browser to log in. Use the same account you pay for. If you ever need to switch accounts, type /login inside Claude.
Don’t launch Claude from your home folder. It works out of whatever folder you start it in, and you want that to be a folder you picked on purpose.
Your first 30 minutes
What you want to do is teach it who you are before you ask it for anything big. Paste this:
Interview me about my business, one question at a time: what I sell,
who buys it, my service area, my prices, and how I talk to customers.
When we're done, write it all to a CLAUDE.md file in this folder.
CLAUDE.md is a file Claude Code reads at the start of every session. Once it exists, you stop re-explaining your business every morning. From here, try one real task you’d normally do by hand, like the follow-up text for a quote you sent last week.
Three keys worth knowing on day one: /help lists commands, /clear starts a fresh conversation, and Shift+Tab switches permission modes.
I wrote a longer beginner version on my blog: How to install Claude on Mac and Windows. It uses the older npm method, so if the two disagree, use the commands on this page.
One honest warning
Claude Code asks before it edits files or runs commands. Read those prompts. Hitting yes to everything is how people end up with a folder they don’t recognize. And skip any tutorial that tells you to put sudo in front of an install command. Anthropic’s own docs say not to.