brew-update
Fetch the latest Homebrew and package definitions
TLDR
Update Homebrew and package definitions
$ brew update
Update with verbose output$ brew update --verbose
Update only if needed (for scripts)$ brew update --auto-update
Force update from latest commit$ brew update --force
Reset Homebrew and taps to origin$ brew update-reset
SYNOPSIS
brew update [options]
DESCRIPTION
brew update fetches the newest version of Homebrew and all formulae definitions from GitHub. It updates Homebrew itself and refreshes the list of available packages.
This command does not upgrade installed packages - use brew upgrade for that.
Aliases: brew up
PARAMETERS
--verbose, -v
Show detailed update information--debug, -d
Show debugging information--force
Always do a slower full update--auto-update
Run only when needed (fast no-op otherwise)--merge
Use git merge instead of git rebase--quiet, -q
Suppress output
AUTO-UPDATE
Homebrew auto-updates before brew install by default. Configure with:
HOMEBREW_AUTO_UPDATE_SECS
Seconds between auto-updatesHOMEBREW_NO_AUTO_UPDATE=1
Disable auto-update entirely
WORKFLOW
$ brew update # Fetch latest definitions
brew outdated # See what can be upgraded
brew upgrade # Install newer versions
brew cleanup # Remove old versions
brew outdated # See what can be upgraded
brew upgrade # Install newer versions
brew cleanup # Remove old versions
CAVEATS
Only updates definitions, not installed software. For installed packages, run brew upgrade after updating. Auto-update may slow down install commands; disable with environment variable if needed.
SEE ALSO
brew(1), brew-upgrade(1), brew-outdated(1)