Disclaimer for 1.6.4 Mod Packs: FTB Lite 2 is the ONLY mod pack that is intended for use on 32 bit systems. All other 1.6.4 mod packs will NOT run properly on 32 bit systems. First, I'd like to thank everyone for their continued patience while the development teams work toward providing you the best modded Minecraft experience possible. It's not easy for the volunteers to make time to work on the launcher, modpacks and configs; we're all appreciative of the work they do. We're all appreciative of you, the users, that you continue to use FTB throughout the ups and downs. Secondly, before you post about issues regarding the updated launcher and the preview/beta packs, please make sure your launcher is installed correctly. You can use my troubleshooting guide (found here) to ensure your launcher is installed correctly. A few quick notes for Mac users (this may also include Linux/Unix users): To use the 1.6.4 packs, you must have Java 7 active on your computer. LWJGL 2.9 is what get installed with Minecraft and the mod packs using 1.6.4 Minecraft. This resolves the issue that previously occurred with your operating system using Java 7 and the launcher. You can find more information about that here. If you wish to continue using 1.4.7 or 1.5.2 mod packs with the new launcher, you will need to update the LWJGL file in those mod packs. Please check out this document, it contains a link regarding how to do so. (Otherwise, you will need to downgrade your Java version every time you wish to change to an older pack) You can not use Java 7 with LWJGL 2.4.2 (which is what comes with the older mod packs). Also, you can not use Java 6 with LWJGL 2.9 (what comes with the 1.6.4 packs). Mavericks users, please read this thread. (This item is spoilered as it is no longer applicable for most users) Spoiler Thirdly, if you are still having issues with the launcher downloading the new mod packs, please be patient. Over the last several days there have been thousands of attempted downloads; if your download times out, or fails, please try again later. Try waiting an hour or two before attempting again. Please read this thread regarding a few things you can try to help alleviate the issues with downloading. While that thread was created for a different reason, the suggestions within it may help you download your mod pack. Lastly, if you do continue to have issues and feel the need to post a thread requesting more help, please post with the following format: By using that format, we can make the support process easier, since you'll have all of the basic information we need to help you. Please make sure to include the link to the console log, posted to pastebin.com. If you are unsure as to what log this is, please read this thread. The console log contains all of the basic information we need, and is the easiest way to verify the information you provide us. Spoiler Thank you all for your patience and understanding. Please remember that many of the 1.6.4 packs are public beta. All in-game bugs need to be reported here if they haven't been reported already. LIST OF UNSUPPORTED THINGS. PLEASE DO NOT ASK FOR HELP WITH THESE. We can't support everything. It's just not possible. That list was created to help staff know what's a priority. If you ask for help with something listed in that thread/article, your thread may be moved from the Tech Support Section. If you do receive help from, it is in an unofficial capacity.