I am on iMAC OSX 10.9 added the following line command.
./minerd --url=stratum+tcp://mine.pool-x.eu:9000/ --userpass=USERNAME:PASSWORD
At start up
./minerd --url=stratum+tcp://mine.pool-x.eu:9000/ --userpass=USERNAME:PASSWORD
[2014-02-20 17:22:56] Starting Stratum on stratum+tcp://mine.pool-x.eu:9000/
[2014-02-20 17:22:56] 8 miner threads started, using 'scrypt' algorithm.
[2014-02-20 17:22:56] Binding thread 0 to cpu 0
[2014-02-20 17:22:56] Binding thread 1 to cpu 1
[2014-02-20 17:22:56] Binding thread 2 to cpu 2
[2014-02-20 17:22:56] Binding thread 3 to cpu 3
[2014-02-20 17:22:56] Binding thread 4 to cpu 4
[2014-02-20 17:22:56] Binding thread 5 to cpu 5
[2014-02-20 17:22:56] Binding thread 6 to cpu 6
[2014-02-20 17:22:56] Binding thread 7 to cpu 7
[2014-02-20 17:23:04] stratum_recv_line failed
[2014-02-20 17:23:04] ...retry after 30 seconds
[2014-02-20 17:23:34] stratum_recv_line failed
[2014-02-20 17:23:34] ...retry after 30 seconds
[2014-02-20 17:24:04] stratum_recv_line failed
[2014-02-20 17:24:04] ...retry after 30 seconds