# Homebrew: Error: Your Command Line Tools (CLT) are too outdated. Update them from Software Update / Please update to the latest macOS

**Code:** `Your Command Line Tools are too outdated` · **Category:** macOS · **Seen on:** macOS

Homebrew requires a newer Command Line Tools version than the one installed.

## Meaning

Update through System Settings → General → Software Update, or reinstall: `sudo rm -rf /Library/Developer/CommandLineTools && sudo xcode-select --install`. If the update isn't offered, download CLT from developer.apple.com. Very old macOS versions may be unsupported by current Homebrew.

## Common causes

- CLT lagging behind macOS/Xcode
- Update not showing in Software Update
- Unsupported old macOS
- Interrupted CLT update
- Xcode newer than CLT

## Quick fix

1. Update in Software Update or reinstall CLT
2. `sudo rm -rf /Library/Developer/CommandLineTools && xcode-select --install`
3. Download CLT from developer.apple.com/download/all

## Detailed fix by platform

### macOS

1. `pkgutil --pkg-info=com.apple.pkg.CLTools_Executables | grep version`

## How to diagnose

1. **CLT** — Version?
2. **macOS** — Supported?
3. **Update** — Offered?

---
Source: [WhatIsMyError](https://whatismyerror.com/errors/macos/brew-clt-too-outdated)