Welcome to Autodesk Forums!

Hi @Anonymous,

Here are AC 2019 for Mac system requirements:
https://knowledge.autodesk.com/support/autocad-for-mac/troubleshooting/caas/sfdcarticles/sfdcarticles/System-requirements-for-AutoCAD-for-Mac-2019.html
So you need Macbook Air 2.1 or later with minimum 4 Gb RAM (I think 8 Gb is the best option)