Mac keeps crashing - error 0x8000000000000003 cannot load EFI/Drivers/TestSupport.efi

hohlp wrote:

thank you for taking the time to respond.

1) anything I can or should do ?

Not unless your Mac can run a newer version of macOS which may install a newer system firmware update that may resolve the issue. Part of the issue may be on Apple's remote servers as well.

2) can I find the log somewhere on my Mac and if so, share it with you and/or anyone who can work something out of it ?

You can try looking in "/Library/Logs/DiagnosticReports" for a file beginning with "kernel" and ending in ".panic". The date & time of the file is found in between those parts of the file name. Post several Kernel Panic reports if you have them. Post the report(s) here using the "Additional Text" icon which looks like a piece of paper.

To look for possible software issues run EtreCheck and post the report here using the "Additional Text" icon which looks like a piece of paper. It is possible the file system issues are the source of the problems.

3) shall I do a full back-up or only what I want to keep ? isn't the risk that when I restore, the bad documents or what was the source of the issue, gets restored as well ?

When you restore from a backup or "clone" the files are copied over to your drive which will have a fresh clean file system if it was erased. The "cloning" utilities for macOS such as Carbon Copy Cloner do not perform an identical clone at the block level so CCC just ends up "copying" the files from the clone (image or drive). I don't use Time Machine, but I think if you have a Time Machine backup you will first need to re-install macOS and migrate your data from the backup since I've heard TM only recovers the main volume and not the hidden recovery partition. Here is how you erase the whole drive:

https://support.apple.com/guide/disk-utility/erase-and-reformat-a-storage-device-dskutl14079/mac

Restore your Mac from a backup - Apple Support

I don't know anything about transferring accounts between an iPhone and Android. I'm not sure it is possible using the method you were using.

As for the pictures of the two errors:

1) That is a common error when trying to boot the Apple Diagnostics. Apple broke this feature several years for some systems.

2) That screen with the different languages is a Kernel Panic. Without a copy of the Kernel Panic log we cannot tell what the problem may be.

3) You have APFS file system issues that First Aid is unable to repair. This means you need to make sure to have a good backup or clone. Then erase the whole physical drive before restoring from a backup or clone.

Either you were using a newer OS which used the APFS file system which Mountain Lion doesn't understand or your hard drive/SSD has failed. If it is the former, then you will need to erase the whole physical drive as GUID partition and MacOS Extended (Journaled) using the instructions in this article:

https://www.owcdigital.com/assets/support/support-formatting-and-migration/Mac_Formatting_6-10.pdf

Here is an Apple article about how to deal with the blinking folder with question mark:

https://support.apple.com/kb/HT204323

If these steps fail, then the hard drive/SSD has most likely failed.