[CentOS] 8.2.2004 Latest yum update renders machine unbootable

Sun Aug 2 15:23:54 UTC 2020
Stephen John Smoogen <smooge at gmail.com>

On Sun, 2 Aug 2020 at 11:06, david <david at daku.org> wrote:

> > > Sorry for being so ignorant, but I don't
> > > understand "just reinstall the kernel".  I don't
> > > know how to translate that into a specific yum or rpm command.
> >
> >I agree  it is a lot of shorthand because of expectations. In the end
> >we (the list) don't know what you have on your system or what state it
> >is in. In order to get that information to help we would need you to
> >try the following:
> >
> >1. boot using a working USB/cdrom/netboot path and installer
> >2. choose the rescue mode
> >3. have the rescue mount the disks as local and chroot into the
> >system. << if possible have the system also bring up networking >>
> >
> >Then
> >yum list kernel shim grub2 mokutil
> >
> >It would also help to know which kind of Mac Mini it is (year, model,
> >firmware versions). Apple changes the internal hardware of these
> >things and how they boot so if there it may be that a particular model
> >is more affected than others.
> How does one obtain that information?  There's nothing written on the box.

I don't have any access to a Mac Mini to help further than this general help:
First I would search google for "how to obtain model version info on mac mini"


Then depending on how the mac mini is being booted (using the windows
compatibility mode or some other method) I would look for howtos on
how to update the firmware.

After that it is time to learn the Mac magic key boot sequences. The
Mac isn't exactly a PC and its UEFI does not have a standard menu
front end like many PC UEFI.


Stephen J Smoogen.