><snip> > >> 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. --------------- 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