Can't authenticate with iTunesConnect Sandbox user in 10.11.2

Originator:jalkut
Number:rdar://23831039 Date Originated:09-Dec-2015 07:03 PM
Status:Open Resolved:
Product:OS X Product Version:10.11.2
Classification:Serious Bug Reproducible:
 
Summary:
Seemingly new to 10.11.2, attempts to authenticate with a sandbox iTunesConnect user account are met with an error message: 

"This Apple ID has not yet been used with the App Store."

Steps to Reproduce:
1. Create any submission-ready app for the MAS
2. Launch on 10.11.2
3. Supply Sandbox credentials

Expected Results:
The app should be validated with a _MASReceipt and launch as expected.


Actual Results:
A dialog is presented:

This Apple ID has not yet been used with the App Store.
Please review your information.


Version:
10.11.2 (15C50)

Notes:
The console log has many notes about storeuid sandbox violations. Perhaps these are related?

12/9/15 6:44:34.163 PM storeuid[472]: Failed to obtain sandbox extension for path=/Volumes/Data/daniel/Library/Caches/com.apple.storeuid. Errno:1
12/9/15 6:44:34.165 PM storeuid[472]: Failed to obtain sandbox extension for path=/Volumes/Data/daniel/Library/Caches/com.apple.storeuid. Errno:1
12/9/15 6:44:34.389 PM storeuid[472]: Could not find image named 'NSImage'.
12/9/15 6:44:34.391 PM sandboxd[157]: ([472]) storeuid(472) deny file-write-create /Volumes/Data/daniel/Library/Caches/com.apple.storeuid
12/9/15 6:44:34.414 PM sandboxd[157]: ([472]) storeuid(472) deny file-issue-extension /Volumes/Data/daniel/Library/Caches/com.apple.storeuid
12/9/15 6:44:34.438 PM sandboxd[157]: ([472]) storeuid(472) deny file-issue-extension /Volumes/Data/daniel/Library/Caches/com.apple.storeuid
12/9/15 6:44:34.951 PM sandboxd[157]: ([472]) storeuid(472) deny iokit-open nvDevice
etc.

Configuration:
MacBook Pro 2014 edition 15" 
MacBook Pro 2014 edition 15"

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