Oct 29, 2018 As users of this Mac cleaner since its initial version way back in 2013, we stand behind the CleanMyMac X software that MacPaw has developed. With the newest update, we believe it to be a solid investment for most Mac users who are reading this review. Jan 17, 2019 Here is our roundup of the best free registry cleaners for Windows, which you can make use of to keep your windows registry healthy and clean. 10 Best Free Registry Cleaners for Windows 10, 8 and 7 Users in 2018. 1) Wise Registry Cleaner. If we were to look at the aspect of a clean and smooth user interface in a registry repair tool, then Wise.
Mac's don't need defragging as OS X automatically writes 2Gb or below sized files to one contiguous space on the drive. There are certain cases where's it's needed to free up a large spaces on the drive, but not something everyone has to do.
Far as other Mac maintainence, there really isn't any except to backup one's files regularly. Keeping Software Updated and run a web browser check to make sure the plug-ins are current.
For Safari and Flash, this check is more accurate
Most of those cleaning programs are junk, especially MacKeeper.
If your friend got onto your computer and visited a bunch of adult sites, then I would recommend something like OnyX, doing ALL the cleaning and maintenance aspects and rebooting, perhaps followed by a Disk Utility Erase free space.
CCleaner beta is out for OS X, used on PC's and combines cleaning and scrubbing of the drive if setup correctly.
Best Free Mac Cleaner 2019 Reddit
If your interested in performance, read my post here
Best Free Mac Cleaner