iMac Drive Partition Issue

Hello, I need assistance with an issue on my iMac. My drive is currently split into multiple partitions, and I would like to restore it to the original state as it was when I first purchased the iMac. I tried to partition the drive using Disk Utility, but something went wrong, and now it’s not set up correctly. Could you please help me restore the drive to its initial setup? Thank you.

iMac 27″ 5K, macOS 13.6

Posted on Nov 14, 2024 5:57 AM

Reply
Question marked as Top-ranking reply

Posted on Nov 14, 2024 7:34 AM

1) Boot the computer in Recovery mode and use Disk Utility to reformat the drive.

2) Then, also while in Recovery mode, use Reinstall macOS to reinstall the OS.


These actions will erase all your data and bring the Mac into a factory fresh state.

I hope you have backed up your data.


How to reinstall macOS - Apple Support


3 replies

Nov 15, 2024 9:13 PM in response to Belich88

Since that is a Fusion Drive as well, it may be a bit more complicated than @D.I. Johnson envisioned since the Windows partitions are only on the hard drive portion of the Fusion Drive.


You may need to perform a simple erase of both physical internal drives in order to destroy the current Fusion Drive setup. Within Disk Utility you will need to click "View" and select "Show All Devices" before the physical drives appear on the left pane of Disk Utility. Then recreate the Fusioin Drive setup using the instructions in the following Apple article:

How to fix a split Fusion Drive - Apple Support


Then you would be able to proceed to quit the Terminal app and select the Reinstall macOS option.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

iMac Drive Partition Issue

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.