Apple Certified Support Professional (ACSP) Practice Exam 2025 - Free ACSP Practice Questions and Study Guide

After the core operating system is loaded, the Launchd step is responsible for starting system processes. Specifically, when Launchd is initiated, it takes on the role of the first process that is executed in user space, effectively managing the launching of all other system and user processes. This means that Launchd is crucial for initializing the user environment and managing tasks, services, and applications that run after the kernel has been successfully loaded.

This step is essential because, once Launchd is up and running, it supervises all subsequent processes and manages system daemons and user services according to predefined configurations. Without Launchd functioning properly, the transition from kernel mode to user mode would not proceed correctly, and the operating system would not be able to launch the required applications for user interaction.

The other options do not occur as part of the Launchd process itself. The system reboot and disk error checks are typically part of earlier stages in the booting process or in system maintenance scenarios, while kernel extension refreshing is related to loading particular drivers or extensions that enhance the kernel's capabilities, rather than the initiation of user processes handled by Launchd.