Still an issue under macOS 26.4.1 and Xcode 26.4 :-( The specified file could not be transferred. Domain: com.apple.dt.CoreDeviceError Code: 7000 User Info: { DVTErrorCreationDateKey = "2026-04-10 08:49:01 +0000"; NSURL = "file:///Users/te/Documents/com.jumpinginsectsoft.DanceReview%202026-04-10%2010:48.40.516.xcappdata/AppData/Library/Caches/"; } -- The specified file could not be transferred. Domain: com.apple.dt.CoreDeviceError Code: 7000 User Info: { NSURL = "file:///Users/te/Documents/com.jumpinginsectsoft.DanceReview%202026-04-10%2010:48.40.516.xcappdata/AppData/Library/Caches/"; } -- Failed to perform I/O operations. Domain: com.apple.dt.remoteservices.error Code: 11001 Failure Reason: Cannot open destination file /Users/te/Documents/com.jumpinginsectsoft.DanceReview 2026-04-10 10:48.40.516.xcappdata/AppData/Library/Caches/com.apple.dyld/DanceReview.dyld4: Permission denied -- System Information macOS Version 26.4.1 (Build 25E253) Xcode 26.4 (24909) (Build 17E192) Timestamp: 2026-04-10T10:49:01+02:00

It is indeed a regression in Xcode 26 + Tahoe. Older OS and Xcode 16.3 just downloaded the container fine.