Home > Questions

iMac boots to a circle with a line through it 🚫

I need help to get my iMac up and running. I have a fusion iMac from 2015 with one 128GB SSD and one 3 TB hard drive. When I boot it up, it shows a circle with a line through it and it says support.apple.com/mac/startup. I went into Recovery mode to reinstall macOS but failed because there is no disk available. When checking my internal drive in Disk Utility, I see two drives: an SSD and an uninitialized HDD. I tried to mount the hard drive to no avail. What should I do to reinstall macOS Big Sur?

Best Answered by

iBoysoft author Jenny Zeng

Jenny Zeng

Answered on Monday, February 19, 2024

The problem lies in your Fusion Drive. Based on Disk Utility, your Fusion Drive has been split into two drives. To make it work, you need to recreate the Fusion Drive.

(The prohibitory symbol on your Mac signifies that your Mac doesn't have a working operating system. You're correct that you need to reinstall macOS. But because your Fusion Drive has been split into separate volumes, your Mac can't find a disk to carry on the installation.)

The process of recreating Fusion Drive involves drive formatting, which will delete all data on your Mac. So, I recommend you get back the data that matters to you from your Mac before proceeding.

Since your Mac can't boot up, you can't simply copy and paste the files off it but need a professional data recovery tool that's able to retrieve data from an unbootable Mac. iBoysoft Data Recovery for Mac is exactly what you need.

Unlike other data recovery software, which requires you to create a bootable installer to recover data, it enables you to restore data on your Mac from Recovery Mode

It supports various file types, such as images, videos, audio, documents, emails, etc., and is compatible with all types of Macs, including Intel-based, T2, M1, and M2 Macs running Mac OS X 10.11 El Capitan and later.

Besides, it allows you to preview files on your Mac for free. Check the steps in the following guide to get your data back from the unbootable Mac.

• Recover Data From Unbootable Mac in macOS Recovery Mode

After your data is secured, you can follow the steps in Solution 6 of the guide below to rebuild the Fusion Drive.

• No Disk to Install OS X or macOS? Fix Disk Not Showing Up


People Also Ask

Read More Questions

Read More Advice From iBoysoft's Computer Experts

Fix Apple Mail search not working on Mac

Fix Apple Mail Search Not Working on Ventura/Monterey/Big Sur

Why is Apple Mail search not working? This article explains the reasons and 12 solutions to fix Mac Mail search not working on Ventura, Monterey, Big Sur, etc.

How to Tips

Disco rígido WD não é reconhecido pelo Mac

Solução para o WD hard drive não aparecer, funcionar, ser reconhecido no Mac

Tutorial para resolver o problema do WD hard drive não aparecer, funcionar ou ser reconhecido no Mac e recuperar dados.

Les disques durs externes se déconnectent sous macOS Sonoma

Le disque dur USB/externe se déconnecte-t-il régulièrement sous macOS Sonoma ?

Votre disque dur USB ou externe se déconnecte-t-il régulièrement après une mise à jour vers macOS Sonoma ? Voici 10 méthodes pour résoudre ce problème d'éjection automatique.