This is a new variant of another questionable app called Advanced Mac Cleaner. Clean up your Mac and keep your browsing behaviour private with CCleaner, the world's favourite computer cleaning tool. Image: Mac Cleanup Pro What is Mac Cleanup Pro. Mac Cleanup Pro is a PUP that poses as a system optimization tool to help your Mac perform better. We show you the best cleanup utility apps for macOS. Mac Cleanup Pro is a dubious application presented as a high quality system optimization/cleaning tool. Mac Cleanup Pro is a potentially unwanted program that describes itself as a system optimization program that can help your computer run better. Optimized Storage in macOS Sierra and later * can save space by storing your content in iCloud and making it available on demand. Malwarebytes lists Advanced Mac Cleaner Pro and similar tools as unwanted applications. At first glance, Mac Cleanup Pro looks like a handy and genuine tool.