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Tried another install from scratch with the same result, images of the BIOS activity are attached. There are 5 UEFI boot volumes in the boot options for my MoBo, none of which are an install volume. It seems that the BIOS is having trouble registering, or is reverting to a state which can not...

Attempting to update from Mojave to Catalina. Updated Clover, downloaded Catalina from the App Store, started the install, but after the first restart during the installation, following the POST beep, the MoBo/BIOS performed some sort of operation that indicated a process involving the backup...

Having an issue with a direct update from High Sierra to Mojave. The installer downloaded and began properly, but during the restarts in the install process, I'm seeing what has been referenced in other forums as temporary, or OS installer volumes titled 'Boot Filevault Preebooter from...

Update: Problem Solved. Not sure which of the following actions fixed it, but hopefully this thread will help someone else. Suspecting that my BIOS was referencing a bad Clover config, I edited the boot device priority list of my (Gigabyte Z97X UD3H) motherboard so that the only one there...

Update: Still no success booting to a Sierra install USB drive, generating the same error, 'Service Exited with abnormal code 1' which leads to a white login screen after several minutes. Forum research suggests a graphics or GPU issue. Tried a huge number of boot flag variables, and at last...

Thanks for checking in. Been working on this all day, and can update with the error 'Service Exited with abnormal code 1' following many attempted boots from a Sierra UniBeast install USB drive. Nothing works. I'm definitely prepared to start completely from scratch, thanks for the advice on...

Did a careless OS upgrade from the App Store from High Sierra to Mojave, installation failed with the message 'Unable to verify Firmware' in the installer. Machine will no longer boot from the installer .dmg, original system drive, or external boot volume. Installer hangs at 'unable to verify...

Having what may be a similar issue with identical hardware. Can get dual monitors working on the GT740 via DVI for both, but experiencing boot crashes and panics with GraphicsEnabler=No. The system boots and runs quickly and reliably with the bootflag GraphicsEnabler=Yes, but with no signal...