Now, download the macOS Mojave patcher by DosDude:

macOS Mojave Patcher

Or if you are installing macOS Catalina (not recommended)

macOS Catalina Patcher

The only reason I do not recommend macOS Catalina is because most non-metal Macs do not have Continuity Support. Therefore, you will lose several wireless features like AirDrop and AirPlay while running macOS Catalina (because macOS Catalina requires newer hardware to run these features)