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This morning my Mac was unable to boot up. Can't restore from time machine because never backed up my mac. Unable to reload OS Sierra, and unable to create a partition on the Harddrive. I don't have a OS on a disk or jump drive. Any suggestion?
iMac 21.5", macOS 10.13
Command (⌘)-R Install the latest macOS that was installed on your Mac.
Option-⌘-R Upgrade to the latest macOS compatible with your Mac.
Shift-Option-⌘-R Install the macOS that came with your Mac, or the closest version still available.
Command (⌘)-R Install the latest macOS that was installed on your Mac.
Option-⌘-R Upgrade to the latest macOS compatible with your Mac.
Shift-Option-⌘-R Install the macOS that came with your Mac, or the closest version still available.
unable to boot mac
