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起動

$ postgres -D /opt/brew/var/postgres/

ログ

$ tail -f /opt/brew/var/log/postgres.log

アップグレード

2021-02-04 01:35:48.632 JST [18778] FATAL: database files are incompatible with server
2021-02-04 01:35:48.632 JST [18778] DETAIL: The data directory was initialized by PostgreSQL version 12, which is not compatible with this version 13.1.

$ brew postgresql-upgrade-database