i need help!

i have a macbook pro 10.4.11, 2ghz intel core duo, 2 gb 667 mhz ddr2 sdram. and i the game crashes randomly as if my computer specs can't handle the load even though i think it can. im not so sure how this posting thing all works so ill just copy paste the errorlog. aside from that, i can't seem to make my character run neither shift nor ctrl is doing the trick. please help me!
Sat Jan 31 12:35:12 2009, <src/client/pscharcontrol.cpp:880 LoadKeys SEVERE>
Sat Jan 31 12:35:12 2009, Failed to map 'F10' to 'Brightness reset'
Sat Jan 31 12:35:13 2009, <src/common/util/psxmlparser.cpp:282 ParseFile SEVERE>
Sat Jan 31 12:35:13 2009, Could not find file: /planeshift/world/hydlaa_jayose/sound.xml
Sat Jan 31 12:35:13 2009, <src/common/util/psxmlparser.cpp:282 ParseFile SEVERE>
Sat Jan 31 12:35:13 2009, Could not find file: /planeshift/world/terr_common/sound.xml
Sat Jan 31 12:35:13 2009, <src/client/psclientdr.cpp:248 HandleStatsUpdate SEVERE>
Sat Jan 31 12:35:13 2009, Stat request failed because CelClient not ready for EID:34345
Sat Jan 31 12:35:19 2009, <src/client/psclientdr.cpp:248 HandleStatsUpdate SEVERE>
Sat Jan 31 12:35:19 2009, Stat request failed because CelClient not ready for EID:34345
Sat Jan 31 12:35:23 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:35:23 2009, Got DR message for unknown entity EID:33798.
Sat Jan 31 12:35:26 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:35:26 2009, Got DR message for unknown entity EID:33569.
Sat Jan 31 12:35:31 2009, <src/client/charapp.cpp:533 Attach SEVERE>
Sat Jan 31 12:35:31 2009, Mesh Factory helms#helm04_$H not found
Sat Jan 31 12:35:53 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:35:53 2009, Got DR message for unknown entity EID:34100.
Sat Jan 31 12:36:13 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:36:13 2009, Got DR message for unknown entity EID:34354.
Sat Jan 31 12:36:19 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:36:19 2009, Got DR message for unknown entity EID:34354.
Sat Jan 31 12:37:03 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:37:03 2009, Got DR message for unknown entity EID:34285.
Sat Jan 31 12:38:09 2009, <src/client/charapp.cpp:533 Attach SEVERE>
Sat Jan 31 12:38:09 2009, Mesh Factory helms#helm04_$H not found
Sat Jan 31 12:38:26 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:38:26 2009, Got DR message for unknown entity EID:33798.
Sat Jan 31 12:38:38 2009, <src/client/psclientdr.cpp:255 HandleStatsUpdate SEVERE>
Sat Jan 31 12:38:38 2009, Server report HP but object is not alive
Sat Jan 31 12:38:44 2009, <src/client/psclientdr.cpp:255 HandleStatsUpdate SEVERE>
Sat Jan 31 12:38:44 2009, Server report HP but object is not alive
Sat Jan 31 12:38:45 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:38:45 2009, Got DR message for unknown entity EID:31961.
Sat Jan 31 12:39:13 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:39:13 2009, Got DR message for unknown entity EID:34354.
Sat Jan 31 12:39:19 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:39:19 2009, Got DR message for unknown entity EID:34350.
Sat Jan 31 12:39:26 2009, <src/client/psclientdr.cpp:212 HandleDeadReckon SEVERE>
Sat Jan 31 12:39:26 2009, Got DR message for unknown entity EID:34379.