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Hey everyone! I'm relatively new to Technic, and I'm having some problems launching modpacks. Whenever I run a modpack, the Minecraft window gets stuck on a white screen. I am running on a Macbook Pro on Mojave 10.14.4. Any advice on how to fix this? If needed, I can post a pastebin from my Technic console. Thank you!

A few days ago I downloaded Minecraft Java Edition in order to to play with Shivaxi RlCraft, with my friends. I have been unable to launch RlCraft for this entire time, and have tried waiting up to 20 minutes each time. I currently have 64-bit Java downloaded and 3.5 GB allotted. I am not sure what else I can do to make this work, and I would love to know that I didn't waste $27 on this process. Any help would be greatly appreciated. Thanks!

So when I launch RLCraft normaly, it works, but as soon as I download Optifine, it just dosent load and comes right back to the Technic Laucher. https://pastebin.com/tU8ErVvP I just copied optifine from there https://optifine.net/adloadx?f=OptiFine_1.12.2_HD_U_E3.jar as they say on the RLCraft page, and copied everything from 7zip into modpack.jar and then delete METAINF from both modpack.jar and minecraft.jar

So I have the launcher options set so it can use 6GB-s of ram but whenever I try to play it caps out at 455MBs. I need some technical help with this