Q: Mackeeper 05 -Clean My Mac

Welcome to the Apple Support Communities

That's a scam, and it's dangerous for your Mac because it can damage OS X without any problem, making your Mac useless and having to reinstall OS X. See > https://discussions.apple.com/docs/DOC-3036

Most of the major users on here will advise you to NOT download MacKeeper and consider it malware.  It has caused untold grief for many of the users.

shbing12 wrote:

 

...  Is this a scam?

It is certainly NOT NEEDED...

In General 3rd Party AV Software is Not Required as Mac OS X tends to look after itself.

Read Here  >  Antivirus Discussion

To keep your Mac Happy... See Here...

http://support.apple.com/kb/HT1147

http://www.thexlab.com/faqs/maintainingmacosx.html

Mac OS X: About background maintenance tasks

MacKeeper review:

acKeeper is a strange piece of software. There may be no other app as controversial in the Apple world. The application, which performs various janitorial duties on your hard drive, is loathed by a large segment of the Mac community. Check out any blog, site or forum that mentions it, and you’ll find hundreds of furious comments condemning MacKeeper and Zeobit, the company behind it. We discovered this ourselves earlier this month, when we offered a 50%-off deal on MacKeeper. Look at all those furious comments on the post.

The complaints about MacKeeper are all over the shop: It’s a virus. It holds your machine hostage until you pay up. It can’t be completely removed if you decide to delete it. Instead of speeding up your computer, it slows it down. It erases your hard drive, deletes photos, and disappears documents. There are protests about MacKeeper’s annual subscription fees. Zeobit is slammed for seedy marketing tactics. It runs pop-under ads, plants sock-puppet reviews and encourages sleazy affiliate sites, critics say.