Add mac os installation guide (#135)

docs/development/environment-setup/mac-os.md

@@ -0,0 +1,102 @@
+---
+path: "/docs/installation-guide-mac-os"
+title: "Mac OS installation guide"
+---
+
+Open terminal app and run the following commands
+
+### Installing the standalone Command Line Tools
+
+Open terminal app and write the code below
+
+```bash
+xcode-select --install
+```
+
+### Install Homebrew
+
+```bash
+ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+```
+
+### Install Git
+
+```bash
+brew update
+brew install git
+```
+
+### Install RVM
+
+You need software-properties-common installed in order to add PPA repositories.
+
+```bash
+\curl -L https://get.rvm.io | bash -s stable
+source ~/.rvm/scripts/rvm
+```
+
+### Install Ruby
+
+Chatwoot APIs are built on Ruby on Rails, you need install ruby 2.6.3
+
+```bash
+rvm install ruby-2.6.3
+```
+
+Use ruby 2.6.3 as default
+
+```bash
+rvm use 2.6.3 --default
+```
+
+### Install Node.js
+
+Install Node.js from NodeSoure using the following commands
+
+```bash
+brew install node
+```
+
+### Install yarn
+
+We use `yarn` as package manager
+
+```bash
+brew install yarn
+```
+
+### Install postgres
+
+The database used in Chatwoot is PostgreSQL. Use the following commands to install postgres.
+
+```bash
+brew install postgresql
+```
+
+The installation procedure created a user account called postgres that is associated with the default Postgres role. In order to use Postgres, you can log into that account.
+
+```bash
+sudo -u postgres psql
+```
+
+### Install redis-server
+
+Chatwoot uses Redis server in agent assignments and reporting. To install `redis-server`
+
+```bash
+brew install redis
+```
+
+Enable Redis to start on system boot.
+
+```bash
+launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.redis.plist
+```
+
+### Install imagemagick
+
+```bash
+brew install imagemagick
+```
+
+Next: Read project setup to install project dependencies