Question: I installed the Xcode 6 GM seed, and I'm trying to create an IPA file for the first time. After archive success, when I click on the Export button, a window appears saying:

> 
> **Failed to locate or generate matching signing assets**
> 
> 
> Xcode attempted to locate or generate matching signing assets and failed to do so because of the following issues.
> 
> 
> * **Your account already has a valid iOS Distribution certificate.**
> 
> 
> If you have your signing identity on another Mac, you can import a developer profile. You can also revoke the current certificate and request one again.
> 
> 
> 

Here's a screenshot of the error:

![enter image description here](https://i.stack.imgur.com/XJOZQ.png)

Can anybody tell me how to solve this?

Answer: 
I got the same thing the first time, and then I realized that in the dev site there was a new provisioning profile that started with XC:
I restarted xcode and xcode automatically found the XC: profile it created earlier and allowed me to sign the app.
It looked as if the restart of xcode and refresh of signatures (after signing in while uploading/verifying the app on xcode) did the trick
This can happen when attempting the first release with a new Xcode version *on the same Mac*.

In my case I had both Xcode 6 and Xcode 5 installed.

I solved the issue by exporting my .developerprofile in Xcode 5 and then importing it in Xcode 6 as follows:

In old Xcode (mine was 5.1.1)
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1. Go to Xcode > Preferences > Accounts
2. Select Gear icon in bottom left
3. Select Export Accounts
4. Set the file to save in a place you'll find easily
5. Enter password that you'll use when importing
6. Select Save

In new Xcode (mine was 6.0.1)
-----------------------------

1. Go to Xcode > Preferences > Accounts
2. Select Gear icon in bottom left
3. Select Import Accounts
4. Select the .developerprofile file
5. Enter the password and you will now be able to continue.

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This works from old Mac to new Mac as well.