IS MacKeeper is safe apps? or virus? what to do?

No. MacKeeper is anything but safe on a Mac. In fact it is so bad, it should be classified as malware.

If you are having problems on your Mac that is cause you to think you need something like MacKeeper or other AV software, please explain to us in detail what the problem is.

It's junk, subject o a couple of class action law suits and uses sleazy selling tactics. Avoid like the plague.

Mackeeper is in a class action suit right now settling a multi million dollar settlement because it was not what it said it was and its selling tactics. Stay VERY clear....