MacBooster is a macOS utility designed to clean junk files, optimize system performance, manage startup items, and scan for malware. It offers features like system cleanup, duplicate and large file removal, memory cleaning, and virus scanning through a user-friendly dashboard with one-click scans, making it accessible for non-technical users. While it can help reclaim storage space and improve system responsiveness, some users report that it flags safe files as threats, overlaps with built-in macOS tools, and occasionally exhibits unexpected behavior. MacBooster is most useful for less tech-savvy users seeking a convenient “all-in-one” maintenance tool, but caution is advised regarding upgrade prompts and its necessity compared to free alternatives.