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Yes .. it should be on mirror.centos.org now .. you could change the repo where your updates come from. OR .. wait for that mirror to get updated.

I just did yum clean all yum update

and 15-8 showed up. Maybe the 'clean all'

did it, or maybe just showed up.

...

I applied the update (yum update), rebooted and... no boot. Just a blank screen.

Hardware is a Mac-Mini :-(

This is not an essential machine, so I could re-install (from netinstall) if you think it's worth the effort.

Or what?

David

You just need to reinstall the kernel and it should work.

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.

However, since this is a crash-and-burn system, I'm going back to a virgin install with netinstall of 7 2003. I'll let you know what the results are.

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On a Mac-Mini, which got hit by the bug in shim, I re-installed Centos 7 2003 from netinstall, selecting minimal as the software selection.

The reboot worked fine.

So, I next tried "yum -y update", noticed shim 7-8 got selected. However, at the completion of the update, I did a reboot and got a blank screen. No grub choices. Not good.

David