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エラー

▼PostgresSQL のerror　Postgres PG::ConnectionBad: could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

$ brew services start postgresql
$ brew services stop postgresql
$ brew services restart postgresql

Postgres再起動で解決

アプリ削除

$ cd ..

$ rm -rf myapp

$ rails db:drop

あとはファインダーからポイ