At 04:18 PM 8/4/2020, you wrote: >Am 05.08.20 um 01:09 schrieb david: >>At 01:54 PM 8/4/2020, you wrote: >>>On Tue, 04 Aug 2020 13:44:05 -0700 >>>david wrote: >>> >>> > After all the updates, the system was NOT bootable. >>> >>>How long did you wait for it to boot, and what >>>did it do when it failed to boot? What text >>>messages showed up on the console? Any >>>reported errors when you ran the update or >>>when you rebooted the computer? If so, what did the say? >>> >>>I personally haven't had any issues updating >>>any of my computers (using a mix of Centos 6, >>>7 and 8) but maybe they're all too old to for the issue to show up. >>> >>>-- >>How long did I wait: 5 minutes >>What on the console: nothing, just a dull gray color >>Errors on update: none >>--------------------- >>But when I blocked the update, it booted within a minute, and ran. > >Can you boot the system with all updates and secureboot=off? >(Just to be sure; I imply that you use UEFI, right?) > >-- >Leon >____________ I'm not sure how to turn 'secure boot' off or if it exists. (MacMini5.2). I presume it uses UEFI, but not sure how to answer that. Boot failure only occurs when the grub2/shim/mokutil updates are applied. David