Who is this?

They said they were from Microsoft and they needed in my computer because there was alot of registry errors

Caller id said New York, did not leave message.

Nice man from an outsourced call center says my computer wasn't accepting Microsoft updates. He said he was a Certified Microsoft Support Specialist. He told me to go turn on my computer so he could help me update my PC. I told him I had an Apple and he said sorry and told me to have a nice day.
A coworker got the same call recently and they managed to charge him $100. Poor man is slow, that's not cool.
I was using the internet on my cell when the call came in, it was a different number initially then changed to this number, which leads me to believe they're using one of those systems that keeps you from knowing their true phone number. I forget what it's called.

this number kept calling me but not leaving a voicemail. When I called it back a man with a heavy accent answered and claimed he was a microsoft certified technician, then asked for my information to look up my account. I asked him if he was a scammer and he just repeated his, I'm a tech, speech. I then accused him of it and told him not to call or I would report him and he hung up on me.