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Why Does My Disk Utility Show Two Hard Disks?

When I open Disk Utility it shows two hard disks? I am using Catalina and have an external hard disk for back up.
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Shirley

Comments: One Response to “Why Does My Disk Utility Show Two Hard Disks?”

    5 months ago

    That’s right. Catalina introduced the read-only System volume. This is a huge security improvement. Apple has a page on it here: https://support.apple.com/en-us/HT210650

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