altstoreio / altstoreio/AltStore

Could not use AltJIT on iOS 15.7.7

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Dominant language
Swift
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Description

So, I'm running iOS 15.7.7, and can't activate AltJIT because Apple deleted 15.7's Developer Disk Image.
I tried to override it with a copy I downloaded from GitHub, but it just tried getting the version from the repo, which doesn't exist.

Error: "The Developer Disk Image couldn't be installed to [IPHONE NAME HERE]. [IPHONE NAME HERE] recieved a invalid response from AltServer"

What could be useful is a "Override JIT download" button.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing AltJIT activation on iOS 15.7.7 and tracing how AltServer obtains the Developer Disk Image, including the attempted repository lookup. Done means defining and implementing a supported override-download flow that installs the correct image and avoids the reported invalid-response error.

Written by the indexing model from the issue text.

Assessment

Tech stack
swift
Domain
mobile
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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