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I know this has been discussed before but I'm stuck at OS10.12.6. I cant update to High Sierra. Downlaoaded 10.13.6 but it stalls at:
'To install macOS High Sierra, a firmware update is required.' Restarting with long tone just takes me back to the same prompt. My firmware seems upto date.
Any ideas?
Mac Pro, macOS 10.12
The Firmware update required to install High Sierra is included in the High Sierra Installer. The computer Required the computer be plugged into Charger and Charger into wall socket for electric power.
The Firmware is going to make the portable computer vulnerable to power loss during if running on battery and during the Firmware update is being installed.
Should power be lost during this operation - the computer may cease to work at all.
Perform the installation from Safe Mode and see if that will work
Thanks MrP. I should've been clearer. It's a mid2010 Mac Pro, so shouldn't have any power issues.
Thanks. Response is the same in safe mode, except for an additonal prompt (below) which results in no action as before.....
'Instal Mac OS High Sierra is trying to add a new helper tool'
High Sierra upgrade - Pro Mid '10
