If you are looking for , the official option is SketchUp Free (web-based) or SketchUp Make 2017 (the last free desktop version for non-commercial use). Neither is SketchUp Pro 2018.
: For a free version, Trimble currently offers SketchUp Free , a web-based application accessible via any modern browser. System Requirements for Mac OS X SketchUp Hardware and Software Requirements
: Introduced scaled vector drawing, allowing users to draft in 2D at scale directly over 3D viewports.
This version introduced the ability to add fills to section cuts automatically, making architectural drawings much more professional without extra manual hatching.
The search query suggests three user intents:
The companion software, LayOut, received significant upgrades.