Lightweight macOS menu bar app that shows which apps are active on which macOS space. Backed by yabai.

brew tap alber70g/tap
brew install --cask spacesbar

Requires macOS 26 (Tahoe) and Apple Silicon. The build is unsigned — if Gatekeeper blocks it, right-click the app and choose Open, or run:

xattr -dr com.apple.quarantine /Applications/SpacesBar.app

brew install alber70g/tap/<formula>

Or brew tap alber70g/tap and then brew install <formula>.

Or, in a brew bundle Brewfile:

tap "alber70g/tap"
cask "spacesbar"

brew help, man brew or check Homebrew's documentation.