Ios Simulator Macos

Ios Simulator On Macos
Ios Simulator On Mac Os X
Mac Os Simulator
Ios Simulator Macos Download
Ios Simulator Web

IOS Simulator Step 1: Install Xcode This step is very easy but it takes a while. Open up the Mac App Store, search for Xcode, and hit. Step 2: Install Xcode Command Line Tools Open Xcode, then choose 'Preferences.' From the Xcode menu (or press ⌘+,). Step 3: Try it out.
Install Xcode from the Mac App Store, it’s free, but it’s a big download, so make sure you have something to do while it’s downloading. Open Xcode once it’s done installing. Finish initial setup. Right-click the Xcode Application in your Applications folder, then choose “Show Package Contents”, then navigate to /Contents/Developer/Applications/iOS Simulator.app, and drag that.
Platform: Windows and Mac. Pricing: $25.00. Download iPadian. This is one of the best iOS emulators for PC because it provides an incredibly user-friendly experience. It is widely utilized by developers to test the iOS apps that they are creating.

Besides the method in my last blog, I keep trying other methods to run the decrypted iOS App. Then I thought of the Xcode Simulator, which had no possibility to run the real iOS Apps before, due to the x86_64 platform restriction. But now, the Simulator from M1 Mac is also the arm64 architecture. Is it possible to run the decrypted iOS App in the simulator now ?

Of course, Yes Now !!!

On your Mac, find the Simulator via Spotlight or by using the following command: $ open -a Simulator Make sure your simulator is using a 64-bit device (iPhone 5s or later) by checking the settings in the simulator’s Hardware Device menu.

I wrote a tool to patch a macho file from iOS platform to Simulator platform.

Ios Simulator On Macos

Patch all the machos (include frameworks, dylibs) within the iOS App by my tool
ad-hoc code signing (free developer)
codesign -f -s - /path/to/macho
Drag the iOS App to iOS Simulator, click to launch

Ios Simulator On Mac Os X

Next I will talk about how to find the patch points.

Drag the decrypted iOS App into the iOS Simulator, and click to launch.

I got the crash :

Mac Os Simulator

Note the Termination Reason: Binary with wrong platform.

Question: How does the OS distinguish the arm64 machos from different platforms ?

I found the answer from the dyld source code

Ios Simulator Macos Download

We can see there are at least 2 kinds of load commands that can be used to mark platform:

LC_BUILD_VERSION
LC_VERSION_MIN_XXX

From my test, it seems that the load command LC_ENCRYPTION_INFO[_64] is also marked as PLATFORM_IOS. So I have to patch 3 kinds of load commands to mark the macho as PLATFORM_IOSSIMULATOR:

Remove the load command LC_ENCRYPTION_INFO[_64]
Remove the load command LC_VERSION_MIN_XXX
Patch the platform to 7 (PLATFORM_IOSSIMULATOR) in the command LC_BUILD_VERSION

From my test, I can directly launch the iOS App from the Simulator after the patch, if SIP is disabled. And I have to re-sign it with ad-hoc (free developer) if SIP is enabled.

Through the effort before, I can launch the iOS App from Xcode Simulator successfully.

But there are some known issues for some specific Apps:

Some iOS App Extensions process crash
Crash due to lack of sandbox entitlements
Maybe other issues for specific App

I have tried to patch to PLATFORM_MACOS directly:

There is no problem for iOS command line program, and it is useful when you need to run iOS command line program on the M1 Mac.
For iOS UI Application, we need to use environment variable DYLD_FORCE_PLATFORM=2 to help us load UIKit.framework from /System/iOSSupport directory.

Ios Simulator Web

Next are the test results for arm64 macho loading :

Arm64 executable process can load arm64e dylib directly.
Arm64e executable process cannot load arm64 dylib.
Patch cpu subtype to 0x80000002 can bypass the platform check to load it successfully.
macOS process cannot load iOS platform dylib, error: mach-o, but not built for platform macOS
Just patch the load_command 0x25=LC_VERSION_MIN_IPHONEOS to 0x24=LC_VERSION_MIN_MACOSX