Homebrew is not detected

1. Open Terminal.
2. Run which brew.
3. Confirm Homebrew is installed in /opt/homebrew/bin/brew or /usr/local/bin/brew.
4. Restart BrewMate.

A package failed

Open Activity, expand the failed command, and read the raw Homebrew output. The final lines usually contain the useful error.

BrewMate will not open

Move BrewMate to Applications, restart the Mac, and reinstall the latest package if needed.