I’ve read that MacKeeper, a 3rd party utility I installed some time ago, does not play well with Apple’s current (and free) operating system, Mavericks.
I tried Mavericks a couple of months ago, but my iMac slowed to a crawl and I reverted back to my earlier system, waiting for Apple to fix things up. As it happens, there were other things that Apple needed to fix, so the hiatus was not wasted time. The slowness, though, was the real deal killer and that was not addressed.
When I finally got wind of the MacKeeper problem, I became convinced that it was time to uninstall MacKeeper and try Mavericks again.
First, I’ll run it for a while on my main iMac. So far, so good. If everything continues to work well after a few days, I’ll upgrade our other Macs to Mavericks, too. I have already removed MacKeeper from them.
If you have MacKeeper installed and want to remove it, just search the web for “uninstall MacKeeper” and you find plenty of help. I used this link.