Apple Certified Support Professional (ACSP) Practice Exam

Using FileVault in macOS is primarily intended to enhance data security by encrypting the entire startup disk, which helps protect sensitive information. The correct rationale for using FileVault involves securing the data on the disk against unauthorized access. In this context, restricting access to the root account isn't a direct function of FileVault itself; rather, it supports the overall security strategy when the data is encrypted.

FileVault can play a part in managing user accounts by ensuring that only authorized users can access the encrypted data. Although restricting access to the root account is essential for securing a system, the primary function of FileVault lies in its ability to encrypt data, ensuring that even if someone gains physical access to the Mac, they would be unable to access the information without the proper credentials.

The other options do not align with the fundamental purpose of FileVault. Enhancing file sharing capabilities, granting guest users administrative privileges, and tracking user activity are not functions served by FileVault, making them less relevant in this context.