/Applications/Postgres.app/Contents/Versions/9.4/bin/psql -h analytic-db.cclbsx5fbhor.us-east-1.redshift.amazonaws.com -U ahmed -d analyticdb -p 5439

http://docs.aws.amazon.com/redshift/latest/mgmt/connecting-from-psql.html

Connect command:

/Applications/Postgres.app/Contents/Versions/9.4/bin/psql -h xxxxxxxx.us-east-1.redshift.amazonaws.com -U xxxx -d xxxx -p xxxx