- Phones and tablets
- iPhone
Error 1015
Apple error 1015 on iPhone or iPad: modified software or older version
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
Apple links error 1015 to unauthorized software modifications or trying to install an earlier iOS version. Restore the device to the latest version using recovery mode, after a backup if you can.
Safety first
Stop and check this first
- Do not try to go back to an earlier iOS version with third-party tools: Apple links that attempt to this error and only restores to the latest version.
- Restore reinstalls iOS and erases all your data. Always choose Update first and avoid restoring without a recent backup when you can.
Safe checks you can perform
- Mac, Apple Devices app or iTunes up to date
- Use only the official Finder, Apple Devices or iTunes
- Restore in recovery mode
Leave these tasks to a qualified professional
- Do not attempt this professional task: Diagnosis at Apple or an Apple Authorized Service Provider
- Do not attempt this professional task: Contact Apple Support
What a technician must be able to justify
A technician is coming
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Diagnosis at Apple or an Apple Authorized Service Provider
What they doAn Apple or Apple Authorized Service Provider technician checks the device with their diagnostic tools and repeats the restore on their own computer and network if restoring in recovery mode does not finish either.
They must show youthe device test result and that the restore also fails on their equipment.
In writingwhich test failed, which part is replaced, its reference and the reason.
Contact Apple Support
What they doIf the error repeats after updating the computer, changing the cable and trying another computer, Apple Support reviews the case and decides whether service is needed.
They must show youthe case number and the steps they asked you to repeat.
In writingthe diagnosis and, if there is a repair, the part and the reason.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Checks and evidence, step by step
Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
- 1
Mac, Apple Devices app or iTunes up to date
No special tools
Procedure
- Who:
- you.
- How:
- on a Mac install any pending macOS updates; on a Windows PC update the Apple Devices app or iTunes. If the computer restarts to update, check for updates again afterwards.
- Result that matters:
- the computer has no pending updates before you try again.
- If the error goes away on the next try:
- the computer software was out of date and the most likely cause.
- If the error returns with everything up to date:
- rule out the computer software and move to the next check.
- Evidence to keep:
- the macOS, Apple Devices or iTunes version and a photo of the message with the error number.
Evidence: iOS update and restore errors
- 2
Use only the official Finder, Apple Devices or iTunes
No special tools
Procedure
- Who:
- you.
- How:
- stop using third-party tools or firmware files. Connect the device and let the Finder, Apple Devices or iTunes download the latest software themselves.
- Result that matters:
- whether the computer offers the current iOS version without the error.
- If it installs:
- the problem came from trying an earlier version or an invalid file.
- If 1015 returns with the official apps:
- move on to restoring in recovery mode.
- Evidence to keep:
- which tool and version you were trying to install before.
Evidence: iOS update and restore errors
- 3
Restore in recovery mode
No special tools
Procedure
- Who:
- you, ideally with a backup already made.
- How:
- with your Mac up to date or the latest Apple Devices app on your PC, connect the device with the USB cable, open the Finder or Apple Devices and bring the device to the "Connect to computer" screen (iPhone 8 or later: press and quickly release Volume Up, then Volume Down, then hold the side button). Choose Update first and Restore only if Update does not work.
- Result that matters:
- whether the computer downloads the software and the process finishes.
- If it finishes:
- set up the device and bring your data back from the backup.
- If you cannot reach recovery mode or it fails again:
- Apple says you might need service.
- Evidence to keep:
- the date of your last backup and the final message.
Evidence: If you can't update or restore your iPhone or iPod touch
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Phones and tablets
- Brand
- Apple
- Product type
- iPhone
Known code variants
- 1015
- error 1015
- iPhone error 1015
- No se encuentra el recurso necesario
- The required resource can't be found
What it means
According to Apple, error 1015 or the message "The required resource can't be found" can mean the device has unauthorized software modifications (jailbreaking) or you are trying to install an earlier iOS version (downgrading). The computer cannot find valid software for that attempt. Apple says to restore to the latest version with recovery mode. It does not indicate a hardware fault.
Warnings and stop conditions
- Mediumeditorial warning
Do not try to go back to an earlier iOS version with third-party tools: Apple links that attempt to this error and only restores to the latest version.
Evidence: iOS update and restore errors
- Highsource verified
Restore reinstalls iOS and erases all your data. Always choose Update first and avoid restoring without a recent backup when you can.
Evidence: If you can't update or restore your iPhone or iPod touch
Symptoms and causes
Probable causes · in order
- Trying to install an earlier iOS versionCommon
It happens when restoring with a file or tool that targets an iOS older than the current one.
Evidence: iOS update and restore errors
- Unauthorized software modificationsPossible
The device was jailbroken or otherwise modified; the error appears even with the official Finder or Apple Devices.
Evidence: iOS update and restore errors
Virtual technician
Does Error 1015 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Apple · 2026 · official_doc
- 2
If you can't update or restore your iPhone or iPod touch
Apple · 2026 · official_doc
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