Apps not installing on the Apple Watch Series 4

Originator:let.adrian.know
Number:rdar://46149424 Date Originated:November 17 2018
Status:open Resolved:
Product:Accessories Product Version:
Classification:bug Reproducible:always
 
Summary: Apps not installing the Apple Watch (watchOS 5.1.1 or 5.1.2 beta) from an iPhone 6 Plus (iOS 12.1)

Steps to Reproduce:
- Pair the devices
- Open WatchApp on the iPhone
- Install `AppleStore` or `GitHawk` app to the watch

Expected Results:
- Should install successfully 

Actual Results:
- Spinning wheel takes very long time doing nothing then spinning
- At some point it it will start installing (on the watch the app icon will appear)
- When 100% is reached the installing indicator changes back to [INSTALL] and the app icon on the Apple Watch disappear
- The app is not being installed correctly
- Observing the logs of the iPhone in the `Console` app on Mac during the installation filtered by the `installd` keyword report logs with an `Error 17`

```
Failed to install app IDENTIFIER (p = N, ui = N) : 
  Error Domain = ACXErrorDomain Code = 17 "
    Got error 17 in install done from remote side (MI error IncorrectArchitecture ;
    Extended 0x0 ; 
    Desc Failed to find matching arch for 32-bit Mach-O input file /private/var/installd/Library/Caches/com.apple.mobile.installd.staging/temp.rwyo0p/extracted/Payload/APP_NAME.app/APP_FILE)
  " 
  UserInfo = {
    SourceFileLine = 591, 
    NSLocalizedDescription = Got error 17 in install done from remote side (MI error IncorrectArchitecture ; Extended 0x0 ; Desc Failed to find matching arch for 32-bit Mach-O input file /private/var/installd/Library/Caches/com.apple.mobile.installd.staging/temp.rwyo0p/extracted/Payload/APP_NAME.app/APP_FILE), 
    FunctionName = -[ACXServerInstallOperation receivedDictionaryOrData:]
  }
```
- This happens on any iPhone 6 Plus regardless the used Apple ID

Version/Build:
- iOS 12.1 (16B92)
- watchOS 5.1.1
- watchOS 5.1.2 (16S5042a)

Configuration:
- iPhone 6 Plus 64gb
- Apple Watch Series 4

Comments


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!