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EFICHECK.DUMP

Beachguy

Beachguy

macrumors 65816
Original poster
Nov 23, 2011
1,008
407
Florida, USA
2011 MBA, 1.7Ghz i5, 4GB/128GB VERY stock 13.3" model.

Updated to the latest beta of High Sierra last night. Started the process and went on to live life while it upgraded. This morning, I look at the screen and see a message that a problem was detected and shows a link to a file EFICHECK.DUMP.

The machine is running just fine. No errors apparent. I know the EFICHECK is a result of an integrity check on the EFI stuff, but I'm at a loss as to what to do and how to tell what the story is. Never had a problem with this machine and I use it a lot.

Thoughts?
[doublepost=1503153751][/doublepost]Trying to use diagnostics, it gives an error "Unable to start diagnostics DEC500"...
 
Not clear - Did the update fail and you can't use the machine? You also said, "The machine is running just fine" - does that mean you're able to boot into the desktop and use the machine normally? Are you able to boot into Recovery?

If you can use the machine normally and you're just curious about the message, fine. Ask the Internet, as you have. While you're at it, file a report or two with Apple using Feedback Assistant (which was installed on your Dock when you joined the beta) - one for the EFICHECK, another for the diagnostics issue.

If the update failed and you aren't able to boot the system (you've clearly restarted at least once, since you tried to run diagnostics)... have you tried booting to Safe Mode? If that doesn't work, you'll probably have to boot to Recovery and Reinstall MacOS.
 
The machine completed the update, and starts and operates normally- no slowdown, no error messages. I am able to boot into recovery, just not diagnostics.

The error message had an option (which I used) to return the error report to Apple.
 
So the only issue you're having now is that you haven't been able to boot to diagnostics? Beyond that, you're curious about a one-time error message?

First, just for a small quibble, a 2011 MBA would boot to Apple Hardware Test, rather than Apple Diagnostics. https://support.apple.com/HT201257 However, both tests boot the same way (press and hold 'D' on startup). The Mac I use for the beta is a late-2013, so it runs Apple Diagnostics.

I have no problem booting to Apple Diagnostics. It seems like you've tried to boot to diagnostics several times without success, but if you haven't tried again, give it another go. Regardless, file a bug report with beta. If Apple Hardware Test still doesn't run and you want to take the time, try reinstalling MacOS from Recovery.

If the EFI had been damaged, the Mac wouldn't have booted after the install. If so, you could have fixed it with a MacOS reinstall from Recovery. But it was a one-time error, which suggests that it was an error in the test, rather than an error in the EFI. Regardless, Apple has the error report already (good that you sent it).
 
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There was an error report which was vague after the install, and then booting into AHT consistently fails with that error (DEC500). That said, let me give it another shot at boot time.
 
Beachguy said:
There was an error report which was vague after the install, and then booting into AHT consistently fails with that error (DEC500). That said, let me give it another shot at boot time.
Click to expand...
I’m having the same problem, can’t boot in AHT, did you find something?
 
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