Unknown login on Macbook Air by _mbsetupuser?

[RoxyRookie]

I am new to Macrumors, so please forgive me if I am posting this in the wrong area or making some other blunder. I noticed some changed settings in Sharing that I did not do (I had turned off all sharing, but then noticed "administrators" listed as being able to share files and printers on my local network). So, I looked up online how to view all logins to my computer (I am the only person using my Mac, so my concern is about remote logins). Using the "last" command in Terminal, I saw logins by _mbsetupuser. Is anyone familiar with that term? Is that a legitimate Mac process?

 

[mag01]

_mbsetupuser is fine, it's used during the OS X update procedure (like when you're at 10.11.3 and install the 10.11.4 update for example)

 

[ghanwani]

Deleted. Wrong forum.