MacKeeper is a scam!
It claims that it will clean up your Mac....by installing more stuff. There are a bunch of discussions about it with a bunch of complaints about MacKeeper as well as dishonest "representatives".
I tested it on the chat, and the representative had horrible English:
Lex:
Hello! How can I help you?
You:
Hi on the Apple forums everyone said that MacKeeper was a trojan. 5 people were complaining about corrupted hard drives from it. ##The complaints weren't actually about corrupted hard drives but other stuff.
You:
Is it safe?
Lex:
Yes it's safe.
You:
So are the complaints fake?
Lex:
Some users are muddling it with MacDefender and MacProtector viruses ##Those are trojans, not viruses...
You:
Maybe, but Idk I'm afraid to download it.
You:
Does it run stuff in the background?
Lex:
Yes if antivirus is turned on
You:
idk it seems like there are a million complaints, and "Is MacKeeper a trojan" is a top Google search
You:
The first 20 results say "yes"
Lex:
What can I tell you... This is wrong opinion ##Bad grammar
Lex:
If you know how to use Mac this software if for you ##Even worse grammar, sounds like a scam salesman
Lex:
People are trying to drag app from Dock to trash to uninstall, can't do so and say it's trojan ##Wow
You:
Are you using Google Translate to translate to English?
The horrible English makes the whole thing sound like a scam too. These guys are just saying that it's not a trojan. By the way, it took that guy forever to respond to each question.
iMac6,1 (Late 2006 iMac Intel), 3 GB RAM, 2.33 GHz Processor, 2 TB internal HD, Mac OS X (10.5.8), Minor GUI mods, a lot of stuff connected with FireWire or USB