Daniscool

Ok thanks plowmanplow

Yah I know that but his is 1.7.10 and every time i drop the .JAR in it crashs my game not when it loads up but when i try to load my world and then when i take it out it works fine

So I'm playing through The Serendipty Unlimeted and i'm trying to install optifine and i have deleted all the meta-inf's and it starts up fine but when i load my world it crashs and sends me back to the Technic Launcher and i've looked around on the forums and on the mod pack forums and didn't find enything that helped