A
A link has been posted in this thread to the "macupdate" website. Do not follow that link, and never download anything from that site. It intentionally distributes OS X malware by packaging some free applications (such as "Firefox" and "Skype") in an unnecessary and malicious "installer."
All software should be downloaded directly from the developer's website or from the App Store. Don't trust any site such as "macupdate" that aggregates links.
B
Never use any kind of "anti-virus" or "anti-malware" software on a Mac. That's how you create problems, not how you solve them.
C
Never use any software that purports to remove other software.
D
"MacKeeper" is a scam with only one useful feature: it deletes itself.
If you have incompletely removed MacKeeper—for example, by dragging the application to the Trash and immediately emptying—then you'll have to reinstall it and start over.
Note: These instructions apply to the version of the product that I downloaded and tested in early 2012. I can't be sure that they apply to other versions.
IMPORTANT: "MacKeeper" has what the developer calls an “encryption” feature. In my tests, I didn't try to verify what this feature really does. If you used it to “encrypt” any of your files, “decrypt” them before you uninstall, or (preferably) restore the files from backups made before they were “encrypted.” As the developer is not trustworthy, you should assume that the "decrypted" files are corrupt unless proven otherwise.
Please back up all data before making any changes.
In the Finder, select
Go ▹ Applications
from the menu bar, or press the key combination shift-command-A. The "MacKeeper" application is in the folder that opens. Quit it if it's running, then drag it to the Trash. You'll be prompted for your login password. Click the Uninstall MacKeeper button in the dialog that appears. All the other functional components of the software will be deleted. Restart the computer and empty the Trash.
☞ Quit MacKeeper before dragging it to the Trash.
☞ Let MacKeeper delete its other components before you empty the Trash.
☞ Don't try to drag MacKeeper from the Dock or the Launchpad to the Trash.
☞ Don't try to remove MacKeeper while running in safe mode.
E
"MegaBackup" is either an untrustworthy cloud-storage application or perhaps actual malware. I haven't tried to make that distinction. To remove it, please start by backing up all data (not with MegaBackup itself, of course.) Then take the steps below.
1. Select the Login Items tab in the Users & Groups pane of System Preferences. Delete any items with a name beginning in "MegaBackup".
2. Log out or restart the computer.
3. Drag the MegaBackup application from the Applications folder to the Trash and empty.
Note that you can't delete any application by trying to drag its icon from the LaunchPad or the Dock. You must open the Applications folder in the Finder.
F
"ZipCloud," sometimes named "JustCloud," is a cloud-storage service with a doubtful reputation. The OS X client is sometimes distributed along with malware. Although ZipCloud may not be malicious itself, it should be suspected by virtue of the company it keeps.
To remove ZipCloud, please start by backing up all data (not with ZipCloud itself, of course.)
Quit the "ZipCloud" or "JustCloud" application, if it's running, and drag it from the Applications folder to the Trash. Don't try to empty yet.
Triple-click anywhere in the line below on this page to select it:
~/Library/LaunchAgents
Right-click or control-click the highlighted line and select
Services ▹ Open
from the contextual menu.* A folder named "LaunchAgents" should open.
In the folder, there may be one or more files with a name beginning as follows:
com.jdibackup.
Move all such files to the Trash.
Log out or restart the computer and empty the Trash.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You may not see what you pasted because a line break is included. Press return.
