Apple Certified Support Professional (ACSP) Practice Exam

For a clean installation of macOS (previously known as OS X), one of the fundamental requirements is that the system disk must be journaled and erased. This ensures that the file system is in a condition that can support the installation process properly.

A journaled file system (such as HFS+ or APFS in newer versions of macOS) provides a way for the operating system to keep track of changes and helps prevent data corruption, especially during unexpected shutdowns. By erasing the disk, you not only clear all existing data but also ensure that there are no residual configurations or settings that could interfere with the new operating system installation. This fresh environment is crucial for the proper functioning of the macOS and achieving optimal performance.

The other options do not align with the requirements for a clean installation. While a network connection may be necessary for downloading the installation files in some situations, such as when using macOS Recovery, it is not a strict requirement for the installation itself if you are using physical installation media. Moreover, having multiple partitions is not a requirement unless you have specific needs for dual-boot setups or similar configurations. Finally, running older software is not a prerequisite for a clean install; in fact, the goal is typically to install the