AltJIT Failing with ConnectionError

[CooperCorona]

I'm trying to enable JIT on DolphiniOS. I followed the instructions, but I kept getting an error. I tried a variety of troubleshooting steps, which changed which error I got, but it did not change the error. I

• Installed openssl@3 using Homebrew.
• I ran python3 -m pip install pymobiledevice3==2.30.0 construct==2.10.69 qh3==0.15.1 according to Documentation on enabling JIT is outdated #1497. This fixed the "LibreSSL" error and the error from that issue.
• Installed DolphiniOS, and selected it in the AltServer > Enable JIT menu.

However, now I'm getting
The process 'altjit' failed with code 1. Could not connect to device 00008110-001838D90AEA401E. The process 'python3' returned unexpected output. ConnectionError

Full error at this Gist.

Some posts say to run the Python commands directly, but when I run python3 -m pymobiledevice3 remote start-quic-tunnel --script-mode, I get the same error. Furthermore, this seems to break the connection to my device. I can't run anything in Xcode, getting a "Waiting for iPad to connect", until I restart both devices.

Versions:

• MacOS Sequoia 15.2
• iPadOS 18.2
• iPad Mini 6th Gen

[CardiganDisaster]

Hello! I have been getting this same exact error whenever I try enabling AltJit for Dolphin iOS ever since I updated to iOS 18.2 on my iPhone as well! Were you ever able to figure out a fix?

I finally was forced to update from iOS 16 to iOS 18, which I knew would cause some issues but this one has me stuck. I've followed every guide possible and was getting an <Epoch.INITIAL: 0> error. That lead me to this thread #1345 (which was super helpful for all the other issues I had) and the same python3 -m pip install pymobiledevice3==2.30.0 construct==2.10.69 qh3==0.15.1 fix you mentioned.

I thought that was going to be the end of it, but now I'm stuck with the connection error :( any help would be appreciated!

My devices

• MacOS Sonoma 14.7.2
• iOS 18.2
• iPhone 14 Pro Max

[rmGFW]

I'm having a similar issue,

Error Description
The process 'altjit' failed with code 1. Could not connect to device 000xxxx0-000xxxxx1001C. The process 'python3' returned unexpected output. Error: No such command 'start-quic-tunnel'.

Failure Reason
The process 'altjit' failed with code 1. Could not connect to device 000xxxx0-000xxxxx1001C. The process 'python3' returned unexpected output. Error: No such command 'start-quic-tunnel'.

Title
JIT could not be enabled for UTM.

Source Line
61

executableURL
file:///Applications/AltServer.app/Contents/MacOS/altjit

exitCode
1

output
/Users/leo/Library/Python/3.9/lib/python/site-packages/urllib3/__init__.py:34: NotOpenSSLWarning: urllib3 v2.0 only supports OpenSSL 1.1.1+, currently the 'ssl' module is compiled with 'LibreSSL 2.8.3'. See: https://github.com/urllib3/urllib3/issues/3020
  warnings.warn(
Usage: python -m pymobiledevice3 remote [OPTIONS] COMMAND [ARGS]...
Try 'python -m pymobiledevice3 remote -h' for help.
Error: No such command 'start-quic-tunnel'.

❌ Unable to enable JIT for UTM on device 000xxxx0-000xxxxx1001C.
Could not connect to device 000xxxx0-000xxxxx1001C. The process 'python3' returned unexpected output. Error: No such command 'start-quic-tunnel'.

[jonreyno]

Also getting the same error as @CooperCorona and @CardiganDisaster after following the same steps to fix the other qh3 error.

Versions:

• MacOS Sequoia 15.2
• iOS 18.2
• iPhone 12 Pro Max

[doublegate]

Same here, as well. iOS 18.2.1, trying on both iPhone 15 Pro and iPad Pro (M4) using MacOS Sequoia and all available suggestions / fixes on GitHub and Reddit ... no-joy.

" ... The process 'altjit' failed with code 1. Could not connect to device 00008110-001838D90AEA401E. The process 'python3' returned unexpected output. ConnectionError ..."

[Nicba1010]

Same issue, iPhone 13 Pro Max, newest ios, M4 Pro Macbook

[aabanic]

Also confirmed on iPhone 13 Pro Max, Newest iOS, M1 Pro Macbook

Error Description
The process 'altjit' failed with code 1. Could not connect to device 00008110-00180D0A0E0A801E. The process 'python3' returned unexpected output. ConnectionError

Failure Reason
The process 'altjit' failed with code 1. Could not connect to device 00008110-00180D0A0E0A801E. The process 'python3' returned unexpected output. ConnectionError

Title
JIT could not be enabled for PojavLauncher.

Source Line
61

executableURL
file:///Applications/AltServer.app/Contents/MacOS/altjit

exitCode
1

output
/Users/ana/Library/Python/3.9/lib/python/site-packages/urllib3/__init__.py:35: NotOpenSSLWarning: urllib3 v2 only supports OpenSSL 1.1.1+, currently the 'ssl' module is compiled with 'LibreSSL 2.8.3'. See: https://github.com/urllib3/urllib3/issues/3020
  warnings.warn(
Traceback (most recent call last):
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/pymobiledevice3/__main__.py", line 148, in <module>
    main()
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/pymobiledevice3/__main__.py", line 100, in main
    cli()
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/click/core.py", line 1161, in __call__
    return self.main(*args, **kwargs)
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/click/core.py", line 1082, in main
    rv = self.invoke(ctx)
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/click/core.py", line 1697, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/click/core.py", line 1697, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/click/core.py", line 1443, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/click/core.py", line 788, in invoke
    return __callback(*args, **kwargs)
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/pymobiledevice3/cli/cli_common.py", line 108, in wrapper
    func(*args, **kwargs)
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/pymobiledevice3/cli/remote.py", line 159, in cli_start_quic_tunnel
    asyncio.run(tunnel_task(rsd, secrets, script_mode, max_idle_timeout=max_idle_timeout), debug=True)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/asyncio/base_events.py", line 642, in run_until_complete
    return future.result()
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/pymobiledevice3/cli/remote.py", line 97, in tunnel_task
    async with start_quic_tunnel(service_provider, secrets=secrets, max_idle_timeout=max_idle_timeout) as tunnel_result:
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/contextlib.py", line 175, in __aenter__
    return await self.gen.__anext__()
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/pymobiledevice3/remote/core_device_tunnel_service.py", line 592, in start_quic_tunnel
    async with service.start_quic_tunnel(
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/contextlib.py", line 175, in __aenter__
    return await self.gen.__anext__()
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/pymobiledevice3/remote/core_device_tunnel_service.py", line 249, in start_quic_tunnel
    async with aioquic_connect(
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/contextlib.py", line 175, in __aenter__
    return await self.gen.__anext__()
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/qh3/asyncio/client.py", line 97, in connect
    await protocol.wait_connected()
  File "/Users/ana/Library/Python/3.9/lib/python/site-packages/qh3/asyncio/protocol.py", line 127, in wait_connected
    await asyncio.shield(self._connected_waiter)
ConnectionError

❌ Unable to enable JIT for PojavLauncher on device 00008110-00180D0A0E0A801E.
Could not connect to device 00008110-00180D0A0E0A801E. The process 'python3' returned unexpected output. ConnectionError

[aabanic]

I suppose it has to do with this nexron171/SimVirtualLocation#20

[CardiganDisaster]

@aabanic That's good to finally know what the problem is with iOS 18.2.

Do we know of a way to switch over to a TCP tunnel instead of a QUIC one using the 2.30.0 version of pymobiledevice3 we need for Altserver?

[Nicba1010]

@CardiganDisaster That was me posting from my wife's account, was trying on her laptop. Well first off it seems Python 3.13 is needed if the message is to be believed. start-tunnel command is not available in 2.30.0. What is the reason 2.30.0 is the only one that works in altstore?