- Dec 21, 2019
- Gigabyte Z390 Designare iMacPro1,1
- RX 5700 XT
Sorry for the late reply. My custom file literally didn't show up in the updater flow (the screen you're showing there). The regular version had the blue button active: I left it that way and turned off the green button. The fix was super easy so I didn't bother taking screenshots or testing further, sorry.
Found a backup of the old EFI, in case you're still interested (blanked the serial et cetera of course).