Possible Temporary Mac Workaround
This worked for me during testing so I believe it may work for now too.
First off, download Tekkit and set it to the most up to date version..log in and all that so it downloads everything.
Then go to the Tekkit mods folder where you normally would put the extra_mods.zip contents and delete everything.
Now download the LinkTart launcher and extract it. Copy the contents of the mod folder within there to the Tekkit mod folder.
I *think* this worked for me (on PC admittedly) when I was testing yesterday...so..give it a go
Did all this, but get the following error:
Mods loaded: 33
ModLoader 1.2.5
mod_MinecraftForge 3.1.3.107
mod_CodeChickenCore 0.5.2
mod_NotEnoughItems 1.2.2
mod_IC2AdvancedMachines v4.0
mod_CCTurtle 1.33
mod_ComputerCraft 1.33
mod_EnderStorage 1.1.3
mod_IC2NuclearControl v1.1.10
mod_InvTweaks 1.41b (1.2.4)
mod_MAtmos_forModLoader r12 for 1.1.x
mod_PowerConverters 1.2.5R1.3.4
mod_Railcraft 5.3.3
mod_RedPowerControl 2.0pr5b2
mod_RedPowerCore 2.0pr5b2
mod_RedPowerLighting 2.0pr5b2
mod_RedPowerLogic 2.0pr5b2
mod_RedPowerMachine 2.0pr5b2
mod_RedPowerWiring 2.0pr5b2
mod_RedPowerWorld 2.0pr5b2
mod_ReiMinimap v3.0_04 [1.2.5]
mod_BuildCraftCore 2.2.14
mod_BuildCraftBuilders 2.2.14
mod_BuildCraftEnergy 2.2.14
mod_BuildCraftFactory 2.2.14
mod_BuildCraftTransport 2.2.14
mod_AdditionalPipes 2.1.3 (Minecraft 1.2.5, Buildcraft 2.2.14, Forge 3.0.1.75)
mod_ccSensors MC1.2.5 Build017pr1
mod_ImmibisCore 49.1.3
mod_IC2_ChargingBench 1.95b
mod_CompactSolars 2.3.2
mod_TubeStuff 49.1.2
mod_ImmiChunkLoaders rev3.2
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem.
--- BEGIN ERROR REPORT 86fd13da --------
Generated 8/7/12 9:56 PM
Minecraft: Minecraft 1.2.5
OS: Mac OS X (x86_64) version 10.7.4
Java: 1.6.0_33, Apple Inc.
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
LWJGL: 2.4.2
OpenGL: ATI Radeon HD 5750 OpenGL Engine version 2.1 ATI-7.18.18, ATI Technologies Inc.
java.lang.Exception: mod_IC2_ChargingBench 1.95b is missing dependency: mod_IC2
at ModLoader.sortModList(ModLoader.java:1886)
at ModLoader.init(ModLoader.java:888)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(RenderManager.java:86)
at ahu.<clinit>(RenderManager.java:14)
at net.minecraft.client.Minecraft.a(Minecraft.java:394)
at net.minecraft.client.Minecraft.run(Minecraft.java:732)
at java.lang.Thread.run(Thread.java:680)
--- END ERROR REPORT 331a15db ----------
industrialcraft-2-client_1.97.jar is in the mods folder...