Kyle-Ye

Using CAHostingLayer in SwiftUI

Background

SwiftUI provides more than just UIHostingController / _UIHostingView (iOS) and NSHostingController / NSHostingView (macOS) for embedding SwiftUI views into UIKit/AppKit.

Starting from iOS 18.0 / macOS 15.0, SwiftUI also offers CAHostingLayer<Content: View> — a CALayer subclass that can host SwiftUI content directly at the layer level. This API is currently marked as SPI (@_spi(ForUIKitOnly) / @_spi(ForAppKitOnly)) and is used internally by UIKit, AppKit, and WebKit.

Accessing CAHostingLayer without Apple Internal SDK

iSapozhnik

Agent Guidelines

Token-efficient build output

• Always pipe Xcode/Swift build logs through xcsift to keep transcripts small and structured.
• Remember to redirect stderr to stdout (2>&1) so xcsift sees the full log stream.

Common commands

• Basic build: xcodebuild -project <app_name>.xcodeproj -scheme <scheme_name> -configuration Debug build 2>&1 | xcsift
• Run tests + coverage: xcodebuild test -enableCodeCoverage YES 2>&1 | xcsift --coverage
• Show warnings explicitly: xcodebuild build 2>&1 | xcsift --print-warnings

krzyzanowskim

extension StringProtocol {
    
    /// str[NSRange(location:0, length: 9)]
    subscript(_ range: NSRange) -> SubSequence {
        guard let stringRange = Range<String.Index>(range, in: self) else {
            fatalError("String index is out of range")
        }
        return self[stringRange]
    }
    

Kyle-Ye

Warning

The following guide need to disable SIP to work.

Please confirm the risk of disabling the SIP by yourself.

Another solution which does not require disabling SIP is currently under investigation.

Step 0

Reboot into Recovery OS + Disable SIP

gabe565

Change Arc Browser Icon

A collection of commands that change the Arc Browser icon on macOS.

Commands

Theme	Command
Candy Arc	defaults write company.thebrowser.Browser currentAppIconName candy

0xdevalias

Reverse Engineering on macOS

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

Table of Contents

• Reverse Engineering Tools
  • Binary Ninja
• Binary Ninja Plugins/Themes

kconner

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

vocaeq

#include <dlfcn.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <mach/mach.h>
#include <mach/error.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/sysctl.h>
#include <sys/mman.h>

mikeyh

#! /usr/bin/python3
#
#   File:       SMJobBlessUtil.py
#
#   Contains:   Tool for checking and correcting apps that use SMJobBless.
#
#   Written by: DTS
#
#   Copyright:  Copyright (c) 2012 Apple Inc. All Rights Reserved.
#

rannn505

{
  "Key Mappings": {
    "0xf702-0x300000-0x7b": {
      "Label": "Cursor Start ⌘←",
      "Action": 11,
      "Text": "0x01"
    },
    "0xf703-0x300000-0x7c": {
      "Label": "Cursor End ⌘→",
      "Action": 11,