Error: Node Sass does not yet support your current environment: OS X 64-bit with Unsupported runtime ( code example

Example 1: Error: Node Sass does not yet support your current environment: OS X 64-bit with Unsupported runtime (88)

npm update node-sass

Example 2: Module build failed: Error: Node Sass does not yet support your current environment: OS X 64-bit with Unsupported runtime (79)

npm rebuild node-sass