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Optiplex 9020: trouble installing macOS Catalina


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How are you today? Jake


I have tried to install Catalina on my Optiplex 9020.

I could install the Mojave but not Catalina.

BIOS version is A25 and all settings are fine.

And I used the bootpack from this link you posted.


But I couldn't install for now.

I attached screenshots.




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