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Black screen while updating to 10.15.3 Catalina

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The only thing I can think of here is to set up my install USB so that it has the right kexts and clover configuration to get around this problem. Any advice on how I might do that?

Like using clover configurator to set up the config.plist on the USB drive?
 
share you clover before you update and I will have a look, it happened to me too but it was the boot args that caused the problem. for reference, here is my clover folder, less is more, only use what you know you need. some kexts and drivers can cause issues when not needed
Here's the EFI folder from my update USB.
 

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  • EFI.zip
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That EFI Folder is jacked, if you have access to a real Mac, just install Catalina onto your HDD that you are planning on using, the install Clover 5103, make sure you have proper kexts and drivers and you be solid.
 
That EFI Folder is jacked, if you have access to a real Mac, just install Catalina onto your HDD that you are planning on using, the install Clover 5103, make sure you have proper kexts and drivers and you be solid.
Jacked how? The Mac I have access to is a laptop so yanking out my SSD isn’t really an option.
 
That EFI Folder is jacked, if you have access to a real Mac, just install Catalina onto your HDD that you are planning on using, the install Clover 5103, make sure you have proper kexts and drivers and you be solid.
Making some progress...I think.

I picked up an enclosure and plugged my ssd into the working Mac. I ran multibeast on the drive and included all the next kexts as suggested, and booted using agdpmod=pikera.

Now after the Apple loading screen, I get this screen.
 

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    6F0070C7-CC76-4173-8653-16778B541AC2.jpeg
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Making some progress...I think.

I picked up an enclosure and plugged my ssd into the working Mac. I ran multibeast on the drive and included all the next kexts as suggested, and booted using agdpmod=pikera.

Now after the Apple loading screen, I get this screen.
pointless without boot verbose first and then take a pic
 
That EFI Folder is jacked, if you have access to a real Mac, just install Catalina onto your HDD that you are planning on using, the install Clover 5103, make sure you have proper kexts and drivers and you be solid.
I took your advice. I wiped the drive clean and started a fresh Catalina install. When I get booted up and running, next step would be installing...multi beast? I’m dubious about this one since the most recent one comes with an older version of clover.
 
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