Out of curiosity, how did you resolve it?
I deleted my backup SSD drive partitions (EFI/APFS/Hidden Restore/Everything). I then took a new 10.13.5 installer, edited the 0087 firmware Name to 0085 so it wouldn't overwrite mine, formatted drive, installed clean. Now using the backup drive as primary until full tested for a couple of weeks.
The primary drive just sitting there as an escape route if this goes bad. Once all done, I'll clone this to the primary drive.
Then installed each app, and tested between each 5 installs. I have a few more, but I use them rarely so I'll do it later when needed. Backed everything up to a couple of different drives.
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I have no issue with boot chime.
Lou
Thanks Lou, me either now...
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I believe that is a Styx song being referenced, not any comment on your process.
pffffftttt
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