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.
![Free Disk Cleaner Mac Free Disk Cleaner Mac](/uploads/1/3/4/3/134378737/927450545.jpg)
- MacCleaning: Free Disk Cleaner for Mac OS X Easeus the makers of free Easeus ToDo Backup for Windows have released a new freeware for Mac OS X. Called the MacCleaning, this free tool lets Mac users to clean Your Mac junk files and keep an eye on the available Disk Space.
- Cleaner-App is a cleaning software tool that organizes and optimizes disk space usage, creating more free storage space on your Mac. Whether duplicate files are taking up precious disk space, your startup disk is full, or you want to see what’s taking up space on your Mac, Cleaner-App provides the best solution.
- Mac Disk Cleaner Features 1. Fast clean junk files such as system caches, system logs, user caches, user logs, trash. Monitor free disk space and alarm you when disk space is running low. Monitor all mounted drives. It would keep an eye on every mounted drives. Eject the mounted.
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.
Best Free Disk Cleaner
Disk cleaner free download - Dr Cleaner, Disk Drill, Disk Health, and many more programs. Clean up your Mac's hard drive of tons of unneeded files and find duplicate files with just a drag.
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.
![Free macbook disk cleaner Free macbook disk cleaner](/uploads/1/3/4/3/134378737/524892200.jpg)
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