Unfortunately, there is no official way to download Forza Horizon 3 for free on Mac or any other platform. The game is a commercial product developed by Playground Games and published by Microsoft, and it requires a purchase to play.
: For older Macs with Intel processors, Boot Camp is the most reliable method. It allows you to install Windows on a separate hard drive partition, giving the game full access to your Mac's hardware. Critical System Requirements Forza Horizon 3 Free BETTER Download Mac
There is . If a site promises one, it’s 100% a scam. Protect your computer and your data. Unfortunately, there is no official way to download
Use Whisky (free, open-source Wine wrapper) for Apple Silicon — but FH3 rarely works well. Forza Horizon 3 Free BETTER Download Mac