If you are looking to install this legacy version on older hardware, here were the baseline requirements for SketchUp Pro 2018:
For users who had purchased SketchUp Pro 2018, upgrading to 2019 required a maintenance renewal. Those with active maintenance could upgrade at no additional cost, with access to SketchUp 2018, 2019, and the next version typically included. sketchup pro 2018
LayOut (the 2D documentation tool bundled with Pro) saw significant improvements in 2018. The introduction of allowed users to draw in 2D over a 3D model with precise scales. It essentially turned LayOut into a more competent CAD alternative for many boutique firms. Key Features at a Glance If you are looking to install this legacy
3D class video card with 512 MB of VRAM or higher (1 GB or more recommended) and full support for OpenGL 3.0 or higher. The introduction of allowed users to draw in
Integrates photo-realistic rendering engines directly into the viewport for high-end client presentations.
Never leave geometry loose. Components reduce file size because SketchUp only remembers the data for one instance, regardless of how many times it is copied.