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iMac 27" starts the software loading but does not load it completely.

My iMac will not turn on after software update..It almost loads up then alert shows up and then runs the start up again but does not start the computer. I have tried this many times and the computer shows the same response .


iMac 27″, macOS 10.13

Posted on Jun 14, 2020 4:01 PM

Reply
Question marked as Top-ranking reply

Posted on Jun 14, 2020 4:30 PM

See if this works...


Safe Boot from the HD, (holding Shift key down at startup), does the problem occur in Safe Mode?


If not...


1. Start up from macOS Recovery

To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Command-R is generally recommended, especially if you never installed macOS Sierra 10.12.4 or later… https://support.apple.com/en-us/HT204904#notupdated

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.

4 replies
Question marked as Top-ranking reply

Jun 14, 2020 4:30 PM in response to wally2800

See if this works...


Safe Boot from the HD, (holding Shift key down at startup), does the problem occur in Safe Mode?


If not...


1. Start up from macOS Recovery

To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Command-R is generally recommended, especially if you never installed macOS Sierra 10.12.4 or later… https://support.apple.com/en-us/HT204904#notupdated

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.

iMac 27" starts the software loading but does not load it completely.

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