Download the .dmg file for the latest version from sketchup.com/download/all , drag the icon into your Applications folder.
Once activated, you can use SketchUp offline for up to 28 days before the software requires an internet ping to re-authenticate. Managing Your License on macOS SketchUp plans and pricing: Compare features & subscribe sketchup pro license key mac
These are no longer sold as of November 2020. If you have an older perpetual license, you will still use a Serial Number Authorization Code provided in your original confirmation email from sketchupmail@sketchup.com 2. How to Activate on Mac Download the