Mac OS seemingly disappeared

[CasuallyDressed]

Hey guys. So my work bought 2 new Mac Minis (about a week before the new Macs came out, go figure) and a Macbook Pro, and I was tasked with getting them set up and bunging Windows 10 on them. I’ve done this a few times before so no biggy. Macbook Pro was smooth, no hiccups whatsoever. The Minis on the other hand...

So they’ve both got Windows 10 on them, but the Mac OS (which was Mojave) seems to have disappeared. I can’t boot into it at all, it won’t show up under Bootcamp from Control Panel (only shows the Windows partition), holding ALT (which is the Windows keyboard equivalent for Option, I believe) during boot up does nothing, holding Windows+R (which I also believe is the equivalent for Command) during boot also does nothing. It’s like it’s not even there.

I’ve come to the conclusion that I must’ve formatted the wrong partition during the Windows 10 installation. Can’t see what else could be causing it. And apparently I did it twice because both Minis are affected :-/

So yeah, how do I get around this? I assume I’m gonna have to reinstall Mojave, but I can’t even get into Disk Utility to get the ball rolling. Any help appreciated

 

[Longkeg]

Can you net boot (hold command-R during startup) the computer ? My guess is that you’ll need to repartition the drive, wiping out your Windows partition, then net-reinstall Mojave and tackle the Windows part again.

 

[CasuallyDressed]

Omg. Ok so you’ll never guess what the problem was...

The stupid wireless keyboard.

It wasn’t recognising me pressing any buttons during boot. I plugged in a wired keyboard and everything worked perfectly. This wireless keyboard though, I have to repeatedly press the ALT button to get the boot options to come up.

Absolutely ridiculous. I was so embarrassed because I figured this out while I was on the phone to Apple support!

 

[Fishrrman]

Wireless keyboards are to be avoided, in my opinion.
Wireless mice? They're ok.
But keyboards? Nope.