Having much the same issuse on OSX 10.6.8, using 13w19a. Either all screen activity freezes except for the mouse, or just just Minecraft becomes entirely unresponsive and has to be force-quit. The following OpenGL error is reported in the launcher console when starting the game, under the headers "@ Post startup" and "@ Pre render" : Client> 2013-05-12 19:40:14 [CLIENT] [SEVERE] 1281: Invalid value
Zachary Elliott-Hatton
Having much the same issuse on OSX 10.6.8, using 13w19a. Either all screen activity freezes except for the mouse, or just just Minecraft becomes entirely unresponsive and has to be force-quit. The following OpenGL error is reported in the launcher console when starting the game, under the headers "@ Post startup" and "@ Pre render" : Client> 2013-05-12 19:40:14 [CLIENT] [SEVERE] 1281: Invalid value