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iPhone XS dead (?) after update to 18.7.3 - help appreciated!

ShiftHappens

ShiftHappens

macrumors member
Original poster
Dec 6, 2022
80
129
My son has been using my old XS for a while and yesterday I tried to install the 18.7.3 update (not sure from what exact version, but I'd guess 18.7.2 or 18.7.1).
Seems the update failed and the phone got stuck in a boot loop:
apple logo for 2s -> black screen for 5 seconds -> apple logo for 2s -> black screen for 5s -> ...

Forced restart (vol up -> vol down -> side button) did not help, so tried connecting it to one of my Macs (running 15.7.3) and went into recovery mode (vol up -> vol down -> side button until "cable and computer icons").
Tried both update and restore, but getting the "The iPhone “iPhone” could not be updated. Declined to authorize this image on this device for this user." error message (or "...could not be restored...").

EDIT: First I tried using my own (macOS) account, but since the error message was talking about user, I created an account for my son, using his iCloud account, but the same error...

My next idea was to go into DFU mode, but I can't get there... Phone goes black as per boot loop above, so screen going black is not helping. Also tried to enter DFU mode using timing, like: vol up -> vol down -> side button for 10s -> side button and volume down for 5s -> vol down for 10s, but I only get into recovery mode, which again doesn't help...

Any ideas?
 
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You need a new signed ipsw restore file. For 18.7.3 for the XS you can find a download directly from Apple here: https://updates.cdn-apple.com/2025F...one11,4,iPhone11,6_18.7.3_22H217_Restore.ipsw

Note the URL starting with https://updates.cdn-apple.com. You can verify independently (via WHOIS search for example) that updates.cdn-apple.com belongs to Apple and hence that this URL is genuine. These ipsw files are the official iOS firmware restore files and only genuine ones from Apple will install in the first place.

The problem you likely have is that whatever ipsw restore file you have either downloaded manually or your Mac has cached automatically is too old and no longer recognized as a genuine one from Apple and so authorizing the restore/install fails. Apple does this regularly, on purpose, to restrict users to restoring only the newest versions of iOS.

You should try the update option with the new file first as a successful installation will save all your data on the iPhone. The restore function might reset the device to factory defaults but it might be necessary to make the iPhone work again.
 
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Thanks!
I'll try that, but it would be weird if that's the case... I've never had any iPhone connected to this particular Mac before, so there shouldn't be any cached iOS updates and the image was downloaded to the Mac when I entered recovery mode...
Not sure how to select a manually downloaded image in the recovery mode screen, but we'll se if I can figure it out.
 
Definitely unusual, i'd try the new file above and see if that works. Rarely though, sometimes a software update will make an unknown hardware failure evident when it tries to install....based on your description, I don't think that's what's happening here, but still a slight possibility.
 
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OK - tried with little success... At least I got another error message (translated, so may differ from what you'd get in English): "The iPhone “iPhone” could not be updated. An unknown error occurred (4013)."

ChatGPT is telling me this is likely due to HW issues (battery, storage, PMIC or lightning port).
So maybe it's time to say goodbye to my trusty old XS... 😢
 
One thought... When I just let the Mac try to update (or restore), it suggests 18.7.2 (not 18.7.3)... Maybe I should try to get the ipsw for that instead..? @okkibs - Do you have a link for that version as well (I haven't been able to find it myself...)?
 
bogdanw said:
Try with ‎Apple Configurator https://apps.apple.com/app/apple-configurator/id1037126344
Click to expand...
Thanks - hadn't thought of that, but didn't work unfortunately...
Screenshot 2025-12-22 at 10.42.54.png
 
You get that message when using the 18.7.3_22H217_Restore.ipsw or with the version downloaded by Apple Configurator?

You can download the 18.7.2 ipsw , but according to https://ipsw.dev/product/version/iPhone11,2
and https://appledb.dev/device/iPhone-XS.html it’s no longer signed by Apple.

Just to exclude it as a potential cause, install MobileDeviceOnDemand.pkg & CoreTypes.pkg and reboot your Mac.

 
That is what I see too, only the 18.7.3 ipsw that I have linked above is signed by Apple. Any authorization error messages are caused by using the wrong ipsw file. The one I linked is correct for that iPhone model and if it does not install then we have to look at that error. That would be error 4013. I think the Apple restore process where it downloads a file in the background isn’t up to date and is downloading 18.7.2 which cannot be used anymore.

Anyway, I do not know what causes the 4013 error, but a workaround for restore issues can be to use a Windows machine. Copy the ipsw to a Windows machine and select it manually for a restore. You’ll need the iTunes software or perhaps the Apple devices software that’s newer, I am unsure as I don’t use Windows at all.

People report that restores failing on macOS can be successful on Windows.

There is a good chance though that a hardware defect caused the update to fail in the first place leading to the boot loop. I suspect that you will not be able to recover the iPhone. If this is about data recovery then there are businesses that can disassemble the device and attempt to replace defective components in order to get the device to boot one last time so you can copy off any data.

For now I’d try suggestions for error 4013 if you can find any and attempt to use a Windows machine for the restore. You’ll need the ipsw file I linked. There is no other ipsw file I can find for your device.

Also you should really try to get the iPhone into DFU mode. And you might want to use a brand new original lightning cable in case yours is of questionable quality and age and might no longer work correctly.
 
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