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Level 1

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the disk you inserted was not readable by this computer

I'm using a MacBook Pro with OS X El Capitan Version 10.11.6. I'm trying to upgrade to Catalina 10.14 - went out and bought a new EasyStore portable hard drive to use with Time Machine. Plugged it in and got the message "The disk you inserted was not readable by this computer." What do I do now? I need to upgrade my OS in order to use my tax software before the 15th of July! Thanks in advance !

MacBook Pro 13″, OS X 10.11

Posted on Jul 9, 2020 9:18 AM

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QuickPost

Level 10

103,335 points

Posted on Jul 9, 2020 10:05 AM

Hello,

Erase and reformat a storage device in Disk Utility on Mac - Apple Support

How to upgrade to macOS 10.15 Catalina - Apple Support

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the disk you inserted was not readable by this computer

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