I had this issue with one of the betas that had a firmware update. I believe I downloaded it again and it worked.The installer prompts to shut down and hold the power button in as per usual. After doing as instructed and holding the power button in to get the fast blink + long chime for firmware / EFI update, the system then issues the normal chime (again, this is usual), but instead of going into the installation, it just goes right back to 10.12 and starts the installer again which has the same old shutdown + hold power prompt. I can do this 20 times and there is no difference. I have reset the NVRAM, no change.
What graphics card do you have in the computer?Right now I can see that my primary goal for this upgrade must be to get the firmware to flash properly on this 2010 model.
Hm, these have not been my experience on our other various Mac Pros. You may want to report these issues to Apple (bugreport.apple.com) as they seem to be very, very interested in issues at the moment such as these. It would be better to submit these sooner than later since those who submit issues earliest and closest to launch will receive the most attention @ashleykaryl.
Right now I can see that my primary goal for this upgrade must be to get the firmware to flash properly on this 2010 model.
What graphics card do you have in the computer?
Sorry to hear. Like I said, it has been an amazing upgrade to finally get this kind performance improvement on all of our Mac Pros so far.
The only real problem so far is this 2010 firmware issue. Oh, I have seen some odd graphical issues from a system update to the graphical subsystem, but I think that should be resolved and it's relatively minor at this point.
Well this is looking like great fun. I managed to get into recovery mode and erase everything before doing a clean install. 1 minute before the end a message pops up saying a reboot volume could not be created on my drive and that was it. No install. At the moment I'm having to wait for 3 hours and hope that the Time Machine restore goes smoothly.
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