Jun 25, 2015 Here are some general tips to keep your Mac's hard drive trim and slim as possible. You should never, EVER let a conputer hard drive get completely full, EVER! With Macs and OS X, you shouldn't let the hard drive get below 15 GBs or less of free data space. Even in 2018, MacBooks still have tiny hard drives that fill up quickly. Luckily there are quick and easy ways to free up space on your hard drive. Here’s how to clean up your Mac and reclaim some drive space.
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
Mac os dmg download yosemite.
Most of those cleaning programs are junk, especially MacKeeper.
Dmg property. 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.
Clean Mac Hard Drive App
CCleaner beta is out for OS X, used on PC's and combines cleaning and scrubbing of the drive if setup correctly.
![Mac Hard Drive Cleaner App Mac Hard Drive Cleaner App](/uploads/1/2/6/7/126752523/444899746.png)
Free Microsoft Hard Drive Cleaner
If your interested in performance, read my post here