Jevin Sweval jevinskie

Getting serial on modern Macs

Modern devices default to serial output over DockChannel by default, which is why macvdmtool serial doesn't work. In order to use legacy UART:

On the target device:

Disable SIP
Disable boot-arg filtering
Set the following boot args:

serial=3 (or serial=7 or whatever)

Native Secure Enclave backed ssh keys on MacOS

It turns out that MacOS Tahoe can generate and use secure-enclave backed SSH keys! This replaces projects like https://github.com/maxgoedjen/secretive

There is a shared library /usr/lib/ssh-keychain.dylib that traditionally has been used to add smartcard support to ssh by implementing PKCS11Provider interface. However since recently it also implements SecurityKeyProivder which supports loading keys directly from the secure enclave! SecurityKeyProvider is what is normally used to talk to FIDO2 devices (e.g. libfido2 can be used to talk to your Yubikey). However you can now use it to talk to your Secure Enclave instead!

	#!/usr/bin/env python3
	import argparse, json, sys, time
	from urllib import request

	PROMPTS = [
	{"name": "code_python", "prompt": "Write a Python function that returns the n-th Fibonacci number using memoization. Include a docstring."},
	{"name": "code_cpp", "prompt": "Write a C++ template function `clamp(x, lo, hi)` that returns x clamped to [lo, hi]. No std::clamp."},
	{"name": "explain_concept", "prompt": "Explain how speculative decoding works in large language model inference, in three short paragraphs."},
	{"name": "summarize", "prompt": "Summarize in two sentences: The Industrial Revolution began in Britain in the late 18th century, transforming manufacturing through mechanization, steam power, and the factory system. It spread to continental Europe and North America during the 19th century."},
	{"name": "qa_factual", "prompt": "Q: What are the four fundamental forces of physics?\nA:"},

	#!/usr/bin/env python3
	"""
	Cross-reference: which "missing" Dup functions are reachable from the
	abc9 engine entry points?

	abc9 engines: &dc2, &dch, &syn2, &synch2, &if, &jf, &lf, &nf, &mfs,
	&sweep, &scorr, &read, &write
	"""

	import re, sys

	#!/usr/bin/env python3
	"""
	Device Tree Overlay Generator - Generates DTS overlays with fragments.
	Creates overlay files that can be dynamically loaded to modify existing device trees
	"""

	import argparse
	import sys
	import os
	import json

	#!/usr/bin/python3
	# SPDX-FileCopyrightText: 2025 Alexis Engelke
	# SPDX-License-Identifier: Apache-2.0
	from bisect import bisect_right
	from dataclasses import dataclass, replace, field
	from typing import NamedTuple
	import sys

	from elftools.elf.elffile import ELFFile
	from elftools.dwarf.callframe import FDE

	#include <assert.h>
	#include <inttypes.h>
	#include <stdbit.h>
	#include <stdio.h>
	#include <string.h>

	/*
	Big-endian prefix varint encoding for 64-bit integers.

	The first byte determines the total length using most significant bits.

	import HDL
	import MM4
	import MolecularRenderer
	import OpenMM
	import QuaternionModule

	import Foundation
	import func QuartzCore.CACurrentMediaTime // profiling on macOS

	// MARK: - Compile Structure

	#!/usr/bin/env bash

	# Bash script to complile LLVM

	# @hoyhoy
	# 11/18/2025

	# Installs to /opt/llvm-${LLVM_VERSION} i.e. /opt/llvm-21.1.6
	# and then symbolically link /opt/llvm-latest to /opt/llvm-21.1.6

	#!/bin/bash

	# MacBook Lid Angle Sensor Diagnostic Script
	# This script helps identify the lid angle sensor on different MacBook models

	echo "=============================================="
	echo "MacBook Lid Angle Sensor Diagnostic Tool"
	echo "=============================================="
	echo ""