Is really clean useless file can improve Mac performance?

[alexsndr]

My Mac shows slowly when I have used it for a long time. I asked a question in Yahoo about this problem. Many people tell me clean some files to improve the Mac speed. Is really useful to do such work?I still have found an article in a website about Magican. can you tell me if I should take such software for my Mac.

 

[DeltaMac]

Maybe this thread will help you decide what to do... (it's one of your previous threads asking the same question...)
http://macosx.com/forums/mac-os-x-system-mac-software/319944-should-i-take-such-mac-software.html
I'm guessing that you work for magican, eh? Maybe you could help them with a better English translation on their site - well, not you - that would be a train wreck, wouldn't it?
Anyway, you'd likely get better results if one didn't need to be insulted by a none-too-professional description at the Magican web site. I understand your concern - who would want that when there's more-established apps like OnyX or Yasu, that can do much the same tricks, without questions about the outcome like you might have with Magican (who knows?)
I say, move on to something more familiar to the rest of the Mac community, and try to ignore the plaintive cries from unknown sources.

 

[Giaguara]

Stick to OnyX or Yasu, and stay away from the software you advertised above.