Cleaning Squad Mac OS
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.
Step 2b: Get the install file for an older version of macOS. For older versions of macOS and Mac OS X it's a bit more difficult to get the install file: Apple doesn't offer downloads of outdated. A: Answer Digital - downloaded from the web. If you have a newer mac, you don't have a CD/DVD drive. Physical is a CD/DVD disk. If you happened to buy the physical media and need to download it instead, like I have a couple times in the past, contact customer service at TurboTax and they will have you read the code off the CD/DVD and put a digital download in your online TurboTax account for.
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.
Cleaning Squad Mac Os X
If your interested in performance, read my post here
Mac Os Clean Up
Oct 1, 2011 12:37 AM