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hi there,
after I format my computer....
with
Command+ALT+P+R
it run with Seirra not high Sierra like before
now
I'm trying to update to high Sierra but it's not happening
please help
need
EFI Boot ROM version for Mac Pro (Mid 2012) MacPro5,1
please help
I search everywhere about firmware updates for (Mid 2012) MacPro5,1
https://support.apple.com/en-us/HT201518
thank you for help.....
I did all..... it keep coming to same message
to install macos high sierra a firmware update is required
I hold the power button until the light flashing and heated the sound....
but no update done
still Mac OS Sierra running
As shown on that screen shot, which you included, Software update is ready, willing, and able to install that EFI update at the beginning of the process to install High Sierra. You need only follow the directions provided PRECISELY, and it will be installed for you. I recommend you print out the screen shot provided by the installer.
Be prepared to hold the power button when you restart, as those directions indicate. Then click the "Restart" button ON THAT SCREEN and the process will begin.
No downgrade required.
The firmware upgrade is performed by a tiny firmware updater software that is placed on your boot drive, then it "sets startup" to that tiny updater. When you click the Restart button, it BOOTS your Mac from that updater, and provided you hold the power button appropriately, will perform the firmware update, followed by the rest of the installation. Drives that are unusual may not be able to boot the firmware updater, so they will not make progress.
After the tone and you release the power button, it should show a Progress bar on the screen. Over the next several minutes, the progress bar should fill up, and then it should return to the Installer screen again.
¿Did you see a progress bar filling up?
If you did, Check the firmware version again.
¿Is there anything unusual about your boot drive? Has it been used for MacOS before?
thank you so much
finally I found why was not booting......
after I remove the USB flash...... the process was perfect and I had High Sierra again.....
thank you so much
appreciate you help and support.... thanks and all the best to you brother.
do I need to downgrade to El Capitan before or what to do.....
it was high Sierra running on it before do the format.
EFI Boot ROM version for Mac Pro (Mid 2012) MacPro5,1
