rbenv install 2.6.2
rbenv global 2.6.2
xcrun --show-sdk-path
sudo mkdir -v /Library/Developer/CommandLineTools/SDKs/
sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
sudo vagrant plugin install vagrant-parallels