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Expo Environment Setup

watchman

Make sure you have brew package manager installed: NOTE: To successfully run the iOS e2e tests, it is essential to install the brew package manager. How to install brew

Now install Watchman. Watchman is a tool by Facebook for watching changes in the filesystem. It is highly recommended you install it for better performance.

brew install watchman

Node

It is recommended to install a Node version manager such as nodenv, nvm, asdf

Install node version defined in the file .nvmrc

Yarn v4

Ensure you are using the correct yarn version (yarn v4.10.3) as noted in the package.json.

Install Yarn v4 using corepack (recommended) 
corepack enable

# check yarn version (should show 4.10.3)
yarn --version
Install Yarn v4 with NPM 
npm install -g yarn@4.10.3

# check yarn version (should show 4.10.3)
yarn --version
Use project's bundled Yarn (no global install needed)

The project includes its own Yarn v4.10.3 binary at .yarn/releases/yarn-4.10.3.cjs. If you have any version of Yarn installed, the project will automatically use the correct version thanks to the .yarnrc.yml configuration.

# check yarn version (should show 4.10.3 when run from project directory)
yarn --version