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Level 1

31 points

Catalina installation error

Hello,

Imac 2017 27' Catalina installation error,

storage error (-69716),

what to do,

thanks in advance

Julius

Posted on Oct 8, 2019 1:57 AM

Best reply

Level 1

4 points

Posted on Jan 13, 2020 5:19 AM

How to fix a split Fusion Drive

If your Fusion Drive appears as two drives instead of one in the Finder, it's no longer working as a Fusion Drive. Here's how to fix it.

If you're using macOS Mojave or later

Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery. Release the keys when you see the Apple logo or spinning globe.
When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
Type diskutil resetFusion in the Terminal window, then press Return.
Type Yes (with a capital Y) when prompted, then press Return.
When Terminal indicates that the operation was successful, quit Terminal to return to the macOS Utilities window.
Choose Reinstall macOS, then follow the onscreen instructions to reinstall the Mac operating system. Your Mac restarts from your Fusion Drive when done.