What is restrictevents?

RestrictEvents is a tool for people running macOS on hardware that Apple didn't intend it to run on, typically Hackintosh builders or anyone using OpenCore to boot macOS on non-standard configurations. It stops macOS from showing warnings, errors, and notification badges that pop up when the operating system notices hardware it doesn't expect, and it can unlock certain features that Apple normally restricts to specific Mac models. At a technical level, it's a kernel extension built on top of Lilu, which is a plugin framework for modifying macOS behavior at a low level. The extension does two main things: it blocks specific macOS processes from running (ones that trigger hardware-related notifications), and it patches parts of the system interface to hide or adjust information that would otherwise look wrong. For example, it can suppress the PCI expansion slot and RAM configuration warnings that appear on systems pretending to be a MacPro, or replace the CPU name shown in System Information with a custom string for non-Intel processors. The people who need this are running macOS on custom-built PCs, older hardware, or configurations that don't perfectly match a real Mac. Without it, they might see persistent notification badges in the Apple menu about memory slots or expansion cards, crash-prone system services tied to unsupported GPUs, or grayed-out features like the memory tab in System Information. Someone running macOS on an AMD CPU, for instance, would use it to patch the CPU brand string so System Information displays correctly. Someone with a Metal 1-era GPU on Ventura or later would use it to stop a background process from crashing. Configuration happens through boot arguments or NVRAM variables, letting users toggle individual patches on or off. The tool is maintained under the Acidanthera umbrella, which is the same group behind OpenCore and many other Hackintosh utilities, so it's designed to integrate cleanly with that ecosystem.