Tekkit help on a mac?

I know this should be on the tekkit forums but nobody is helping me so i thought i'd ask here-

How would i even download the launcher for my mac? I always get shit tons of errors and i really want to play tekkit. Here is some fancy techno shit about my computer: Model Name: iMac
Model Identifier: iMac7,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 1 GB
Bus Speed: 800 MHz
Boot ROM Version: IM71.007A.B03
SMC Version (system): 1.20f4
Serial Number (system): W874143JX85
Hardware UUID: 00000000-0000-1000-8000-001B63A73CE7


I am pretty sure i need a new java but which one PLEASE help me or at least link me or something IM DESPERATE!