Tekkit Mac OS Hard Crash

[Ashrin]

Launcher/pack Version: org.spoutcraft.launcher.Main Version 1.0 (1.0) Technic Launcher Build 1.0.1.2 Running ModPack Build 2.1.0 | 1.1 | Rec. Build

Operating System: Mac OS X 10.7.3 (all related minor updates done as of May 4, 2012)

Version of Java: 1.6.0_31 from Apple Inc.

Description of Problem: While playing Tekkit multiplayer I have random hard freezes on my computer. Just before automatic system reboot the render area displays what appears as colored static in lines. I cannot unfortunately capture this as it displays only momentarily and my computer is unresponsive.

Error Messages: N/A

Link to pastebin of log: http://pastebin.com/RFspFE6j

Related information:

I am running tekkit Server from my computer served to my home network where only my wife and I have access. Her computer is unaffected by the crash until my computer reboots, and then she is kicked from the server.

Inventories of anybody logged in at the time of crash is reset to their inventories at their last logout. (this isn't a huge problem, included in case it hints at any cause)

I am using caspertheghost's Technic/Tekkit server launcher. As recommended by caspertheghost I have installed Java 7.x in order to run the server.