Make sure you have Ruby & RubyGems installed - For a step-by-step guide, read Jekyll docs installation
Once you have purchased the theme simply extract the .zip file on your local machine.
bundle install
bundle exec jekyll build
Run jekyll serve
or bundle exec jekyll serve
to start the Jekyll server.
bundle exec jekyll serve
You can visit http://localhost:4000
in the browser to see the local development site.