Boot Problem
I bought a mac mini on 24th january. Serial number of mac is C0***1HV. I am now in a problem to set up mac os mojave 2nd time after erasing disk.Now no disk utility arise. please help me.
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Did you purchase this Mac mini new directly from Apple or an Apple Authorized Reseller? Was there some reason that you needed to re-install macOS Mojave?
Regardless, take a look at the following article on how to use Recovery Mode to install the macOS on your mini: