Where does Homebrew install on Apple Silicon?

On Apple Silicon Macs (M1/M2/M3/M4), Homebrew installs at /opt/homebrew. On Intel Macs, it installs at /usr/local. The paths are different due to macOS architecture requirements.

How do I fix 'Error: No available formula' after updating?

Run brew update to refresh the formula index. If a formula was removed, check if it was renamed or replaced. Use brew search to find alternatives.

Homebrew Errors — Common brew install, update, and Permission Failures

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Overview

Fix common Homebrew errors on macOS including installation failures, permission denied errors, broken bottles, and formula resolution issues.

Key Details

Homebrew is the most popular package manager for macOS, installed at /opt/homebrew (Apple Silicon) or /usr/local (Intel)
brew doctor diagnoses common Homebrew issues and suggests fixes
Homebrew installs pre-compiled 'bottles' when available, falling back to source compilation
Permission issues are common after macOS upgrades that reset directory ownership
Homebrew requires Xcode Command Line Tools: xcode-select --install

Common Causes

Permission denied on /opt/homebrew or /usr/local directories after macOS update
Xcode Command Line Tools not installed or outdated
Homebrew itself outdated causing formula resolution failures
Conflicting system Python or Ruby interfering with Homebrew's dependency management
Network issues preventing bottle downloads from GitHub

Steps

1Run brew doctor to identify and get fix suggestions for common issues
2Fix permissions: sudo chown -R $(whoami) /opt/homebrew (Apple Silicon) or /usr/local (Intel)
3Update Homebrew: brew update && brew upgrade to get latest formulas and packages
4Install Xcode CLT: xcode-select --install (required for compilation)
5Fix broken links: brew cleanup && brew reinstall <package>
6For persistent issues: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)" then reinstall