If you need the complex conditional logic, repeating tables, or data validation that InfoPath was famous for, modern web form builders are your best option.

Adobe Fill & Sign is free on mobile; Acrobat Reader is free for basic filling on Mac.

Pursuing this leads to dead ends (like running a Windows VM) or security risks from fake installers.

Let’s assume you have zero budget and an Intel-based Mac. Here is the exact free method: