Thanks for the post, it worked on both 10.13.1 and 10.13.2.
I tried 10.13.2 and found the 0x55 at 0x22474, replace with 0xC3 as the post #1 and it worked.
MD5 of the original: da1e17572159b5db36f637c9d48ac2cb
MD5 after edit: 21e480e5e3bd91abf964ed46843b1b6c
Applied the edited version on two custom macs and both worked. One of them was Nuc6i7kyk, which used to show the log for quite a few seconds.
Actually, I wrote this string from the post #1 when looking for 0x55:
00 48 83 C4 48 5E 5D C3 55 48 89 E5 4D 89 C1 48
And use it again in 10.13.2 to locate the 0x55. The string appears only once, so it seems safe to try. Of cause, use at your own risk.