Hello! It looks like the device is possibly an SSD replacement candidate. I'll have to check into that. I did erase the drive after clicking on the option to view all devices. I deleted both the partition and the root physical drive using the Disk Utility. I'm wondering if maybe the EFI is corrupted or if the creation of the boot records when installing are somehow not what they should be. Other solutions have talked about having to have the Apple support team do a firmware upgrade, fix the EFI, etc., which I'm not sure why I couldn't do myself.
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I appreciate the response and will keep working on it while our Apple stores are closed. Thanks!
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- Follow the below steps in order to create a bootable macOS Catalina USB Drive. Format your USB Drive:. Connect your USB drive to the USB port of your computer. Press Command+ Space to launch spotlight, type in ‘Disk Utility,” and press the return to launch the app. Search for your USB drive under the sidebar of the Disk utility app.
- After using various USB installers and attempting to boot from an external drive w/ Catalina freshly installed, all of this failed in similar fashion. Further research uncovered some disturbing information, I am quite confident that EFI corruption is the issue.
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MacOS Catalina's name was inspired by Santa Catalina Island, popularly known as Catalina and one. How to create a bootable macOS Big Sur USB install drive Step 1: Download macOS Big Sur. After Big Sur launches later this year, you’ll be able to download it directly from the Mac App Store.
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May 13, 2020 2:09 PM