Minecraft Mod Too Many Items/Not Enough Items for Mac 1.8?

Does it even exist yet? I've already downloaded Forge and have the profile and all that, but I've spent hours googling and trying different downloads that have lead me nowhere. I'm under the impression that both of these mods are practically the same, so it doesn't matter which one it is, if there even is one existing that's mac compatible. Also, do I need to download this thing called ChickenCore or something like that? I'm entirely new to modding, so sorry if I sound like an idiot here… But help me.