# AltServer

## <mark style="color:blue;">AltServer 1.7.4 (Windows only)</mark>

<mark style="color:blue;">**March 24, 2026**</mark>

* Fixed apps crashing on launch on iOS 26.4
* Updated codesigning library to match AltStore & AltServer macOS

## <mark style="color:blue;">AltServer 1.7.3 (Windows only)</mark>

<mark style="color:blue;">**February 8, 2026**</mark>

* Fixed -22410 error when installing and refreshing apps

## <mark style="color:blue;">AltServer 1.7.3 (macOS only)</mark>

<mark style="color:blue;">**May 22, 2025**</mark>

* Fixed enabling JIT on iOS 17.4+&#x20;
  * Requires pymobiledevice3 3.2 or later

## <mark style="color:blue;">AltServer 1.7.2</mark>

<mark style="color:blue;">**September 16, 2024**</mark>

* Fixed apps becoming unverified on iOS 18

## <mark style="color:blue;">AltServer 1.7.1 (macOS only)</mark>

<mark style="color:blue;">**November 30, 2023**</mark>

* Increases default AltJIT timeout to 90 seconds
* Change AltJIT timeout via `defaults` Terminal command:

  `defaults write com.rileytestut.AltServer JITTimeout [seconds]`
* Adds `--timeout` argument to `altjit` CLI tool

## <mark style="color:blue;">AltServer 1.7 (macOS only)</mark>

<mark style="color:blue;">**September 18, 2023**</mark>

### **New**

* Mail Plug-in no longer required!
* Supports macOS 14 Sonoma

**`altjit` CLI**

* Command-line tool to enable JIT on iOS 17 devices
* Used internally by AltServer, but can be run manually via Terminal
* e.g. `AltServer.app/MacOS/altjit enable DolphiniOS --udid [device ID]`
* Requires installing additional dependencies (view [AltJIT page](https://faq.altstore.io/how-to-use-altstore/altjit) for instructions)
* Thanks to [pymobiledevice3](https://github.com/doronz88/pymobiledevice3) for their work on the iOS 17 Developer Disk format!

### Fixed

* Fixed AltJIT on iOS 17
* Fixed "About" panel appearing behind other apps
* Updates Copyright year to 2023

## <mark style="color:blue;">AltServer 1.6.2 (macOS only)</mark>

<mark style="color:blue;">**September 28, 2023**</mark>

### **New**

* Mail Plug-in no longer required!

### Fixed

* Fixed "About" panel appearing behind other apps
* Updates Copyright year to 2023

##

## <mark style="color:blue;">AltServer 1.6.1 (Windows only)</mark>

<mark style="color:blue;">**February 20, 2023**</mark>

* Supports Apple IDs with Advanced Data Protection (ADP) enabled

## <mark style="color:blue;">AltServer 1.6</mark>

<mark style="color:blue;">**January 30, 2023**</mark>

### **New**

#### Revamped Error Handling

* Completely revamped error handling to include as much information as possible, which should make debugging certain issues much easier
* Revised error messages to be more descriptive and provide more suggestions
* Adds “View More Details”/”Help” button to error alerts to view detailed error information
* Adds "Search FAQ" button to error alert
* Revised error domain format to `[Module].[ErrorType]`
* AltServer.ServerError codes start at 2000
* AltStore.AppleDeveloperError codes start at 3000
* Uses underlying error messages (if available) for several AltServer.ServerError errors
* Encodes/Decodes all Codable user info values, not just recognized types

#### iOS Version Compatibility

* Checks iOS compatibility before installing AltStore
* Downloads latest compatible AltStore version for your iOS device

### **Improved**

* Uses `CFBundleDisplayName` instead of `CFBundleName` for app name if it exists **(Windows)**
* Revised error messages to match AltServer macOS **(Windows)**

### **Fixed**

* Fixed error encoding CodableError Int/UInt user info values
* Fixed adding failures to NSErrors with nil localizedFailureReasons
* Fixed occasional crash when receiving requests from AltStore **(macOS)**
* Fixed installation alerts saying "iPhone" instead of actual device name **(macOS)**
* Fixed AltServer notification icon not appearing in Windows 11 22H2 taskbar **(Windows)**

## <mark style="color:blue;">AltServer 1.5.1</mark>

<mark style="color:blue;">**July 14, 2022**</mark>

* Fixed signing in with Apple IDs that contain capital letters
* Fixed signing in with Apple IDs that have 2FA enabled but don’t have any registered trusted devices
* Fixed incorrect “Developer Disk incompatible with \[iOS Version]” error when enabling AltJIT
* Fixed installing Mail plug-in after uninstalling it **(macOS)**
* Fixed memory leak when refreshing apps over WiFi **(macOS)**
* Fixed an issue causing wired connections to occasionally stall **(macOS)**
* Fixed an issue causing indefinite high CPU usage after enabling AltJIT **(Windows)**
* Fixed an issue causing indefinite high CPU usage after updating AltStore **(Windows)**

## <mark style="color:blue;">AltServer 1.5</mark>

<mark style="color:blue;">**May 3, 2022**</mark>

### **New**

#### AltJIT

* Allows sideloaded apps to use Just-in-Time (JIT) compilation
* Go to "Enable JIT" > \[Your Device] from the AltServer menu, then choose a sideloaded app
  * Your device must be on the same WiFi network as AltServer or connected to your computer via USB
* JIT will remain enabled until the app is quit from the app switcher or purged from memory in the background
* Requires iOS 14 or later

#### Direct .ipa Sideloading

* Sideload apps (.ipa's) directly to iOS devices without installing AltStore first
* Hold Option (macOS) or Shift (Windows) when clicking the AltServer icon to reveal new "Sideload .ipa…" menu option
* Supports iPhones and iPads running iOS 9.3 or later
* Supports Apple TVs running tvOS 9.3 or later **(macOS)**
  * For now, Apple TVs must be manually paired with Xcode first
* Apps sideloaded with AltServer must be manually re-installed every 7 days
  * Install AltStore to automatically refresh your sideloaded apps in the background

#### Multiple Device Support

* Install AltStore onto multiple iOS devices using the same Apple ID
* You must use the same computer to install AltStore each time

#### Mail Plug-in Improvements (macOS)

* AltPlugin can now be updated independently from AltServer&#x20;
* AltPlugin is no longer required if both System Integrity Protection (SIP) and Apple Mobile File Integrity (AMFI) are disabled

### Improved

* Added “…” to menu items that require additional user input to match macOS HIG **(macOS)**
* Prefers “Individual” paid teams over free teams if there are multiple Apple Developer teams associated with your Apple ID
* Revokes the previous iOS Development certificate created by AltStore (if one exists) instead of revoking a random one
* Updated “Cannot activate more than 3 apps” error alert to list all sideloaded app bundle IDs
* Revised code signing logic to more accurately match Apple’s codesign tool
* Improved error message when authenticating with invalid anisette data
* Improved error messages for libimobiledevice errors
* Improved error messages for various AltServer-specific errors
* Updated libimobiledevice dependency to 1.3.0
* Updated LaunchAtLogin dependency to 4.1.0 **(macOS)**

### Fixed

* Fixed “App Group does not exist” error when sideloading apps
* Fixed a potential crash when disconnecting an iOS device from your computer
* Fixed a potential crash when sideloading certain apps
* Fixed potentially registering an app group twice when sideloading an app containing app extensions
* Fixed “RSTPlaceholderView\.nib couldn’t be saved” error when sideloading apps **(macOS)**
* Fixed duplicate “Revoke Development Certificate” alerts when sideloading apps **(macOS)**
* Fixed issue unzipping .ipa’s with unexpected files in Payload directory **(Windows)**
* Fixed ignoring some error responses from Apple’s developer servers **(Windows)**
* Fixed memory leak when parsing responses from Apple’s developer servers **(Windows)**
* Fixed various memory leaks when managing a device’s provisioning profiles **(Windows)**
* Fixed various memory leaks when installing AltStore or sideloading .ipa’s **(Windows)**


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://faq.altstore.io/release-notes/altserver.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.