Minecraft wiki entry for Custom_texture_packs, associated text: The Mac comes with a program called Archive Utility. First, open Finder and go to Finder>Library>Application Support>minecraft>bin. If the folder is not there, check Finder>(User)>Library>Application Support>minecraft>bin Find minecraft.jar and right-click (or control+left click) and click "Open With" and "Archive Utility". Archive Utility will create a new folder called "Minecraft". Notice that this is a new folder, and that minecraft.jar is still intact. You can therefore modify and delete the new folder without altering your minecraft.jar. Create a new folder on your desktop, and drag all the necessary files into it. Now you are ready to edit.