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.

Monitor the usage of Mac memory and clean them up with a click by using Memory Cleaner X. The memory cleaning tool shows the memory used by the system and applications as well as the amount of memory currently available. There's also the Dr. Cleaner Menu (see above), a mini app that shows up on Mac menu bar once you install Dr. At first glance, it's like the Apple's Activity Monitor app built into macOS. But I find the Dr. Cleaner Menu much convenient and easier to use because I don't have to launch Activity Monitor via Spotlight search every time I want to know what's going on with my Mac's real-time status. Often, paid cleaners come with the best features and the most reliable support. Paying a relatively small amount of money for a Mac cleaner makes a lot of sense if it can extend the life of your Mac computer for another year or two. The developers of CleanMyMac know how Macs work; they also know how to clean up a Mac with a click of a button. CleanMyMac monitors the activity of many. Often, paid cleaners come with the best features and the most reliable support. Paying a relatively small amount of money for a Mac cleaner makes a lot of sense if it can extend the life of your Mac computer for another year or two. The developers of CleanMyMac know how Macs work; they also know how to clean up a Mac with a click of a button. CleanMyMac monitors the activity of many common Mac apps as well as the operating system itself to remove junk from every inch of your Mac.