Make sure that there is an environment variable called DEVKITARM with the path of the directory before the "bin" directory containing "arm-none-eabi-as", "arm-none-eabi-cpp", "arm-none-eabi-ld" and "arm-none-eabi-objcopy".
Then get the compiler from https://github.com/pret/agbcc and run the following commands.
Then get the compiled tools from https://github.com/pret/pokeruby-tools. Copy the `tools/` folder over the `tools/` folder in your pokeemerald directory.
Installing pokeemerald on a Mac requires macOS >= 10.12 (Sierra or higher).
To get pokeemerald up and running, run the following commands in Terminal:
Make sure you have the right compilers.
```
xcode-select --install
```
Download a [devkitPRO pacman](https://github.com/devkitPro/pacman/releases/tag/v1.0.0) package (`.pkg`) and install using the native Installer.
This will install the devkitPRO package in `/opt/devkitpro`.
You must install devkitARM using
```
sudo dkp-pacman -S devkitARM
```
Then set environment variables
```
export DEVKITPRO=/opt/devkitpro
echo "export DEVKITPRO=$DEVKITPRO" >> ~/.bashrc
export DEVKITARM=$DEVKITPRO/devkitARM
echo "export DEVKITARM=$DEVKITARM" >> ~/.bashrc
```
Now download and install the game's compiler from <https://github.com/pret/agbcc>. You should download and unpack the `.zip` and move the folder to the same folder holding pokeemerald.