I've tried searching for it, and going to my Minecraft app and looking at its contents but there was still nothing. I need the folder so I can install mods.
The minecraft folder lives inside your Application Support folder, which is inside your personal Library folder… which MacOS hides from you.
There are two ways to get to your minecraft folder:
1. Easy way
Open Minecraft and launch the game. Click Options…, Resource Packs…, then at the bottom of this screen, find and click Open Resource Pack Folder.
You will now have a finder window open that is inside your minecraft folder. Navigate up one folder by typing ⌘↑ and you will be looking at your minecraft folder.
2. Harder way, but more permanent
You can tell MacOS to un-hide your Library.
Note: Don't use this method if:
- this is a shared family login
- if you're concerned about you or someone else messing with the stuff inside Library and breaking something
- you have any other doubts
The Library is hidden mostly because things can go slightly (not usually badly, but inconveniently) wrong if the files inside it are messed with. (Minecraft being an exception, because you're here to mess with it on purpose instead of accidentally.)
If you have any doubts, just use the easy method. If you're Master and Commander of this computer and you're not worried you'll break anything though, I find this way more convenient.
With an unhidden Library, you can always get to your minecraft folder by navigating Home → Library → Application Support → minecraft.
To un-hide your Library, you need to run a command inside Terminal.app. Either search for Terminal.app, or find it inside Applications → Utilities. Run Terminal.app, and when it's ready, copy this command into it and press enter:
/usr/bin/chflags nohidden ~/Library
If it gives you errors or says you can't do that, then that's OK, no harm done — you just have to give up on this method and use the easy method.
Optional: Make a shortcut for next time
Now that you're here, you may want to make a shortcut (also called an alias) to make this slightly easier.
- Navigate up one more folder, so that you're looking at your Application Support folder.
- Right click on minecraft to get the context menu, and choose Make Alias. A shortcut named minecraft alias will appear.
- Drag that shortcut (not the original!) to your Desktop or anywhere else convenient. You can rename it to whatever you like. Opening this shortcut later will open your minecraft folder.