Ok so first off if you plan to build something big in single player or even on a server you’re going to need this mod. Its impossible for anyone person to know the i.d numbers for all the items in Minecraft by heart. This gives you access to all the items in Minecraft when looking into your inventory.
To install this mod you need to download two files:
After downloading both files place them on your desktop and unzip them using the Archive utility, or the Unarchiver you should have one of these pre-installed on your Mac. Now go to this file directory Finder/Library/Application Support/minecraft. when in the minecraft folder open the bin folder. this is what you should see.
Open the bin folder you will see a folder that says minecraft.jar open that minecraft.jar file with Archive Utility or the Unarchiver.
After that, you have a new folder named minecraft now you delete the original minecraft.jar file or put it anywhere else on your computer.
name the new minecraft file minecraf.jar, when you do this it will ask you if you want to add .jar and you click add.
open the new minecraft.jar file find the META-INF folder and delete it. after that open the ModLoader folder you unzipped in the beginning and copy all the files in the ModLoader folder to the new minecraft.jar folder it will ask if you want to replace the files. Tick the apply for all and click the Replace button.
Keep the minecraft.jar window open and copy all the files from the Too Many Items folder into the minecraft.jar folder. it will ask you if you want to replace, you click replace. Thats it!! You’re done!! it was that easy. Now to test if you did it properly open your Minecraft application. start a new world or join an already existing world and open your inventory there should be all the items in the game on the right side of your inventory just click on what you want and start building that dream castle or whatever.