Is MacKeeper a safe option for your computer?

I have a Mac and have been getting a repeating opo-up that asks me to open a window with an IP on it, and I ignored it. However it keeps coming up and I k now Macs are safe and don't need an Antivirus because they come protected with one, but they may get malware, which is what I think this is.

Anyway I did buy MacKeeper, but when I bought it, I got a window with some technicians listed on them asking me to help set up the Mackeeper. When I clicked on it, someone was asking me to click on a window with a white circle and a blue cross. I did, and then he was asking me to open up Accessibility to allow him to connect with me.

Years ago I was almost scammed and so when this happened, I thought of that experience and shut my computer down as I had clicked on Access already, and other windows were popping up to send an authorization code to MacKeeper, which I never saw where it was sent to.

So when I turned on the computer again, I saw my background in now plain without my picture background that I had set up on it.

IS anyone here familiar with this? Was this s possible scammer? I intend to call up the customer service for this program and tell them this to see if that man was legit or a scammer.

Updates
11 mo
I finally found the culprit that was causing constant pop-ups in my Notifications. I took a picture of the pop-up, and it was from a source I did not know, called ixzc4. borderretahntent. com. I don't know what it is, and why it is in my Notifications. and I can't get rid of it either. But I turned the notifications off for it, and now it is not able to come up anymore.
Is MacKeeper a safe option for your computer?
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