ppq.apple.com returning 502 Bad Gateway - Unable to verify developer apps on device

Code Signing Certificates, Identifiers & Profiles
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simonsruggi OP
Created 1w
Replies 139
Boosts 172
Views 11k
Participants 128

Since this evening (March 10, 2026), I'm unable to launch any developer-signed app on my physical device (iPhone 16 Pro Max, iOS 26.4 beta 23E5223k). The error is:

"Unable to launch [app] because it has an invalid code signature, inadequate entitlements or its profile has not been explicitly trusted by the user."

On the device itself, it shows: "Unable to Verify App - An internet connection is required to verify the trust of the developer."

What I've tried:

  • Created a new Apple Development certificate
  • Deleted and reinstalled the app
  • Restarted the device
  • Tested on both Wi-Fi and cellular
  • Confirmed Developer Mode is enabled
  • Removed all third-party CA certificates from the device
  • Verified the code signature is valid (codesign -dv shows correct Authority chain)

The root cause:
https://ppq.apple.com is currently returning 502 Bad Gateway. I confirmed this both from my Mac (curl -s -o /dev/null -w "%{http_code}" https://ppq.apple.com → 502) and from Safari on the device.

This affects all developer-signed apps, not just a specific project.

Is anyone else experiencing this? Is there an ETA for the fix?

Environment:

  • Xcode 26.3 (17C519)
  • macOS 26.3.1 (25D2128)
  • iPhone 16 Pro Max, iOS 26.4 (23E5223k)
Answered by DTS Engineer in 879488022

Well, that was exciting |-:

It looks like Apple fixed the issue.

Yep.

I can’t really go into details here, other than to say that:

  • ppq.apple.com is a service on the critical path for the trusted execution of code in some situations [1].
  • It was having problems.
  • Those are now fixed.

I don’t have time to read through all 10 pages of posts on this thread. So, if there’s something you want to draw my attention to here, I recommend that you start a new thread with the details.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

[1] There might be more info about it on the enterprise support side of things, but the only developer-focused reference I could find for it was in an old Xcode help page: Manually trust a developer on iOS.

Boost
Replies  139
Boosts  172
Views  11k
Participants  128
WxDev OP
1w

Same. Started about an hour ago for me. Tried updating devices, restarting Macbook, etc. Same message everytime.

"Unable to Verify App"

50
bengovernment OP
1w

Yep, same here. guessing it's some kind of outage.

35
alanshutko OP
1w

Glad to see it isn't just me.

36
str-ccoppoletti OP
1w

The application could not be launched because the Developer App Certificate is not trusted.

Same here. Can't sign mobile app builds from xCode.

3
farmforge1 OP
1w

I am having this issue as well. No devices will build the app. 3 different iphones, 3 different computers. Any idea what is going on?

1
Bikrrr OP
1w

I really need some kind of alert system for posts like this so I don’t waste 20 minutes trying to fix something I can’t fix.

ChatGPT (eventually) led me to this thread…thank goodness.

46
Bruno_CM OP
1w

Same here. I thought it was my device or my app.

1
systembuilder OP
1w

haha same here - thank god for chatgpt

1
Pacango OP
1w

damn, i spent 30 minutes trying to reset everything :D started about an hour ago

1
LSpeed OP
1w

Okay I found this post after 30min trying find out the problem in my code. Because it's happened in exact same time when I decided to clone my app into other folder and tried to build cloned app on my iPhone/

1
ByronUnion OP
1w

We are seeing the same issue, enterprise app is a critical piece of our insfrastructure. Any ETA on a fix here?

1
vlad163 OP
1w

Same issue on my end. We have thousands of iPads not being able to load Production app that users rely on for their business. This is crazy.

2
MicheleNoc OP
1w

Hi devs! same for me with Flutter, Swift, and different devices. I don't feel alone anymore haha I agree, a warning email would be needed for this inconvenience...

2
eldotta OP
1w

Same here. FWIW, I get a 200 (ok) from time to time. Dont be fooled, 502 should come when you try a couple of times.

1
silviofreitas OP
1w

Same here :(

1
ppq.apple.com returning 502 Bad Gateway - Unable to verify developer apps on device
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