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Gosu depends on the SDL 2 library. Install Homebrew and run:
brew install sdl2
And then install gosu via gem:
gem install gosu
Some useful info you can find here https://github.com/gosu/gosu/wiki/Getting-Started-on-OS-X.
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Install required gems:
bundle install
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Install MongoDB. Installation instructions: https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/
After success installation you need to run MongoDB as macOS service and check that its running:brew services start [email protected] brew services list
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Copy .env.sample to .env file and specify your MongoDB settings if it need.
cp .env.sample .env