Mac Rmemory Cleaner
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.
Mac Memory Cleaner
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.
Memory Cleaner Speed Up Your Mac. The first and the most efficient Memory Cleaner on the Mac App Store. Don't waste your memory; clean it. Solution: Memory. OS X: Your Mac likes to cache things in your 'free' RAM so if you need them later you can load them quickly. This might be nice sometimes, but if you need to free up a lot of memory for a.
Clean your Mac's hard drive Sometimes, all your MacBook needs is a data clean-up. Over the years, you've probably cluttered your Mac with files and applications you no longer use or need. Mac Cleaner is a utility application which helps you remove unwanted files and optimizes your Mac. It usually comes with features such as RAM cleaner, Junk and temp files remover, disk cleanup, memory cleaner and optimizer to thoroughly clean & maintain your Apple computer’s health. Memory Cleaner (was Boost & Memory) is an app to monitor memory usage and clean up your memory. It increases your Mac’s performance by cleaning cached memory, making more memory available for new apps. The application monitors RAM usage on your computer and frees up unused memory with one click. Memory Cleaner monitors RAM usage on your computer and frees up unused memory with one click. With Memory Cleaner, you can easily manage your memory usage. An animated status icon in the menu bar shows you the percentage of memory being used, as well as memory cleaning being run. Memory usage information displayed in the menu bar. If you are not a power Mac user, another way to help you quickly locate unnecessary files is using CleanMyMac, an app that won our award for the best Mac cleaner software. As you can also see in my detailed review here, I believe CleanMyMac is a must-have app for all basic users. Remove duplicate files with Gemini 2.
For Safari and Flash, this check is more accurate
Best Mac Memory Cleaner
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.
Best Mac Memory Cleaner 2019
CCleaner beta is out for OS X, used on PC's and combines cleaning and scrubbing of the drive if setup correctly.
If your interested in performance, read my post here