Ethan Priest allyouaskfor

Reverse Engineering on macOS

Some notes, tools, and techniques for reverse engineering macOS binaries.

Downgrade and dualboot status of almost all iOS devices

UPDATED: 2025-09-25

Reddit mirror: https://www.reddit.com/r/iOSDowngrade/comments/j1x7iv/downgrade_and_dualboot_status_of_almost_all_ios/
GitHub Gist mirror: https://gist.github.com/LukeZGD/9d781f1b03a69fa46869384a9407a41a
As of updating this post, there is now a free downgrade tool that utilizes a SEP exploit released for A9-A10X devices, turdus merula: https://sep.lol/
- Untethered with blobs guide: https://ios.cfw.guide/turdusmerula/
- Tethered guide: https://ios.cfw.guide/turdusmerula-tethered/
Save SHSH blobs for signed iOS versions using TSS Saver or blobsaver

Upload Large Files with Dropbox v2

To upload large files with Dropbox, you need to use upload sessions.

The utility function below can be used for this purpose.

It uses the Dropbox Python SDK to upload the local file specified as file_path to the remote path specified by dest_path. It also chooses whether or not to use an upload session based on the size of the file.

Various Versions of macOS/OSX will fail on install for various reasons. You can fix them by disconnecting from your wifi or network or resetting your NVRAM. Booting from your USB stick, opening terminal and doing: date ########## where the # nubers are below. Format is: MMDDhhmmYY

10.16 - 0.5 Leopard   - date 0101010121 <- Currently not needed
10.15 - Catalina      - date 0101010120 <- Currently not needed
10.14 - Mojave        - date 0101010119 <- Currently not needed
10.13 - High Sierra   - date 0101010118

10.12 - Sierra - date 0101010117

	### WARNING: READ CAREFULLY BEFORE ATTEMPTING ###
	#
	# Officially, this is not recommended. YMMV
	# https://www.raspberrypi.com/news/bookworm-the-new-version-of-raspberry-pi-os/
	#
	# This mostly works if you are on 64bit. You are on your own if you are on 32bit or mixed 64/32bit
	#
	# Credit to anfractuosity and fgimenezm for figuring out additional details for kernels
	#

	# This file is an example config file for cartesian style printers.
	# One may copy and edit this file to configure a new cartesian
	# printer.

	# DO NOT COPY THIS FILE WITHOUT CAREFULLY READING AND UPDATING IT
	# FIRST. Incorrectly configured parameters may cause damage.

	# See docs/Config_Reference.md for a description of parameters.
	########################################
	# TMC2209 configuration

	# This file contains pin mappings for the stock 2020 Creality Ender 3
	# V2. To use this config, during "make menuconfig" select the
	# STM32F103 with a "28KiB bootloader" and with "Use USB for
	# communication" disabled.

	# If you prefer a direct serial connection, in "make menuconfig"
	# select "Enable extra low-level configuration options" and select the
	# USART3 serial port, which is broken out on the 10 pin IDC cable used
	# for the LCD module as follows:
	# 3: Tx, 4: Rx, 9: GND, 10: VCC

	(*
	Description: Applescript to open/close picture-in-picture in Safari
	Supported Applications: Safari, IINA
	Author: Daniel Rotärmel
	Source: https://gist.github.com/danielrotaermel/201f549d5755ea886eb78bb660133722
	Instructions:
	Assign this to a global keyboard shortcut with better touch tool / hammerspoon etc. - suggested: cmd+ctrl+p.
	Make sure "Developer > Allow JavaScript from Apple Events" is enabled in Safari.
	Download the BTT preset here -> https://share.folivora.ai/sP/3dd264e3-5d16-425f-8ab3-ce14877ec04f
	*)

	/* Credit https://chrome.google.com/webstore/detail/youtube-thumbnail-resizer/pbkkiocccjpeadoiakfbljdbhhdimoac
	It's seriously just 1 css rule! 🤯 */
	.ytd-rich-grid-renderer {
	--ytd-rich-grid-items-per-row: 6;
	}

	/* Updated version: https://reddit.com/r/youtube/comments/qwjc10/how_to_display_more_thumbnailsitems_on_youtube/hl4fwty/ */
	ytd-rich-grid-renderer {
	--ytd-rich-grid-items-per-row: 6 !important;
	}

	# This file contains pin mappings for the Creality Ender 5 Plus.
	# Ender 5 Plus stock uses a Creality v2.2 board, similar to CR-20 Pro.
	# To use this config, the firmware should be compiled for the AVR atmega2560.

	# See the example.cfg file for a description of available parameters.

	[stepper_x]
	step_pin: PF0
	dir_pin: PF1
	enable_pin: !PD7

Ethan Priest allyouaskfor

Reverse Engineering on macOS

Table of Contents

Downgrade and dualboot status of almost all iOS devices

Upload Large Files with Dropbox v2