Newbie Mac user - how to start over with Mac mini that has Windows installed I'm very, very new to using Macs in general - my current work computer (iMac Mid 2010) is the first that I've used, and it's only been a couple of months.  

I work for a non-profit and someone has kindly donated a Mac mini (late 2012) to us.  However, it has Windows 7 installed on it (why, I don't know).  I'd like to use the mini as a work computer at home to sync with what I'm doing at the office.  I've looked at the boot menus, and it doesn't look like there's any remnants of the Mac OS left - it was wiped clean and has Windows installed.  

There might be a super-easy answer to this (I've done searches here that don't seem to match my general situation, but I could have missed it), and I apologize for my lack of Mac knowledge here, but I want to install a Mac OS back onto the Mac mini.  What's the best approach?  Thanks.
The easiest way to tackle this is to treat the Mac mini as if it had a blank drive and you needed to (re)install macOS from Internet Recovery.


Install OS on iMac with blank hard drive is a post that has all of the steps involved in getting a "factory fresh" install of macOS on your machine
Your late 2012 mini already supports Internet Recovery
If all else fails, you can use your iMac to create a USB Installer of macOS