问题 I'm attempting to install gpg-agent , but I am getting an error that the formula doesn't exist: $ brew install gpg-agent Error: No available formula with the name "gpg-agent" ==> Searching for a previously deleted formula (in the last month)... Warning: homebrew/core is shallow clone. To get complete history run: git -C "$(brew --repo homebrew/core)" fetch --unshallow Error: No previously deleted formula found. ==> Searching for similarly named formulae... Error: No similarly named formulae