[quote='897883022, Reishandy, /thread/835400?answerId=897883022#897883022, /profile/Reishandy'] That was it. [/quote] Yay! [quote='897883022, Reishandy, /thread/835400?answerId=897883022#897883022, /profile/Reishandy'] Disabling Enable Debug Dylib Support alone did not fix it [/quote] OK. Thanks for confirm that. After I wrote that response yesterday I dug into how App Sandbox actually learns about the libraries you’re seeing, and my conclusion that the debug dylib thing wouldn’t .debug.dylib wouldn’t affect things, so I’m glad that my theory aligns with your reality (-: [quote='897883022, Reishandy, /thread/835400?answerId=897883022#897883022, /profile/Reishandy'] Debug worked the whole time for probably an unrelated reason. [/quote] Yeah, that’s the only bit I don’t fully understand here. [quote='897883022, Reishandy, /thread/835400?answerId=897883022#897883022, /profile/Reishandy'] would it be worth filing this as a separate, more targeted bug … against the CoreData+CloudKit/App Sandbox i