Re: Xcode 8 Beta error launching simulator

I cannot offer a solution, but I am seeing the same problem when signing a macOS Framework. The target codesigns perfectly with Xcode 7 on the same system. I have so far been unable to understand exactly what "detritus" code signing is complaining about.

I fixed this issue by removing the resource info on some photoshop created png files that I manually copy into my application bundle.

You can use "ls -al@ file_names" to see the extra finder and resource info.

You can use "xattr -c file_names" to remove this info.

For me it was because my project folder was within a folder that synced to iCloud, moving it outside this folder into one that isn't synced and deleting the derived data folder fixed the issue.

This helped a lot. Same thing for me. XCode 8 beta 4 suddenly started complaining about this. Here is how I resolved it in details.

The error was

/Users/timevision/Library/Developer/Xcode/DerivedData/MyApp-fwnvtcqqgyeoaqbsvmfeuzvjiqdg/Build/Products/Debug-iphoneos/MyApp.app: resource fork, Finder information, or similar detritus not allowed

So basically do the following

cd "/Users/timevision/Library/Developer/Xcode/DerivedData/MyApp-fwnvtcqqgyeoaqbsvmfeuzvjiqdg/Build/Products/Debug-iphoneos/MyApp.app"

ls -al@ *

This will display any file that has extended attributes set. Look for any file that has @ at the end of the attributes. Mine was,

-rw-r--r--@ 1 timevision  staff     9014 Aug  6 22:12 AppIcon20x20@3x.png

  com.apple.FinderInfo     32

  com.apple.metadata:_kMDItemUserTags     42

Then I remembered adding this bloody new AppIcon in photoshop recently. Going back to my "Images.xcassets/AppIcon.appiconset" path I saw the file indeed has the extended attributes set.

Then I used "xattr -c *" cmd to clear all extended attributes for the icon files, and recompiled. Now XCode no longer complains, codesign works and runs fine now. Hope this helps.

The easy way (which will do all png files) I used:

find . -name "*.png" -exec xattr -c {} \;