I need slight help with my setup, I’m totally puzzled and stuck:
I recently upgraded my mac pro 5.1 12 core with radeon 4870 and osx 10.12.6 to
Radeon rx580 and osx 10.3.6
While on boot room MP51.0089.B00 I did clone my drive with 10.13.6 to external USB drive and was able to boot from it by holding option key, I did test that and it worked.
my main drive is ASPF, my backup drive is Mac OS extended.
I have run an upgrade of firmware to 144.0.0.0.0 did another clone to my USB drive and when I hold Option alt nothing shows up on the screen now.
How I can boot from my external USB 2.0 cloned backup? Why firware update would kill my ability to boot from USB drive? I was able to boot from that drive in RX580 just yesterday.
Any help would be greatly appreciated. I would like to have working backup before upgrading to mojavie, just in case to be able to rollback.
I recently upgraded my mac pro 5.1 12 core with radeon 4870 and osx 10.12.6 to
Radeon rx580 and osx 10.3.6
While on boot room MP51.0089.B00 I did clone my drive with 10.13.6 to external USB drive and was able to boot from it by holding option key, I did test that and it worked.
my main drive is ASPF, my backup drive is Mac OS extended.
I have run an upgrade of firmware to 144.0.0.0.0 did another clone to my USB drive and when I hold Option alt nothing shows up on the screen now.
How I can boot from my external USB 2.0 cloned backup? Why firware update would kill my ability to boot from USB drive? I was able to boot from that drive in RX580 just yesterday.
Any help would be greatly appreciated. I would like to have working backup before upgrading to mojavie, just in case to be able to rollback.