CCleaner is the number-one tool for fixing a slow Mac. It protects your privacy and makes your Mac faster and more secure! Please note: We have tested CCleaner using various screen readers and for the best user experience, we recommend using the latest version of NVDA - Download Free Version Buy Now. It's a tool for your day job, for school or a tool to do all the stuff you like doing where you need a computer of some sort. If you're worried about using it then consider spending half the amount on a cheaper option and putting the rest towards a holiday.
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.
If your interested in performance, read my post here
Free Mac Computer Cleaner Reddit 2019
Oct 1, 2011 12:37 AM