homebrew

Resolve PostgreSQL 'could not connect to server: No such file or directory' error on macOS Mountain Lion with Homebrew 0.9.3. Fix stale PID, sockets (/tmp/.s.PGSQL.5432, /var/pgsql_socket), launchctl, and Rails rake db:migrate issues step-by-step.

Resolve 'ZIP does not support timestamps before 1980' error in Homebrew Python formulas like kosmorro with termcolor 3.3.0 and hatchling. Set SOURCE_DATE_EPOCH to clamp timestamps and fix wheel builds during pip install.

Install a specific Homebrew formula (e.g., postgresql@8.4.4) via versioned @-formulae or brew extract into a tap. Commands, linking, pinning and troubleshooting.