Apple Certified Support Professional (ACSP) Practice Exam

File quarantine on a Mac plays a critical role in enhancing the security of the system by monitoring files downloaded from the internet or transferred from other external sources. When a file is marked as quarantined, it triggers a warning message when the user attempts to open it. This allows the user to be informed that the file is from an external source, giving them the opportunity to be cautious, as such files could potentially contain malware or unwanted software.

The other options do not accurately represent the function of file quarantine. For instance, file quarantine does not prevent all files from being opened; it specifically issues warnings on those that have been flagged. It also does not automatically delete files, nor does it collect user data, ensuring users have control over their downloaded files while being made aware of potential risks. This emphasis on user awareness is crucial in maintaining safety in a digital environment.