Xcode 10, Command CodeSign failed with a nonzero exit code

Question

Everytime I build console is showing this message.

CodeSign /Users/admin/Desktop/AppStoreBuild/Project201/build/Debug-iphonesimulator/Project.app (in

Answer 1

This is because Code signing no longer allows any file in an app bundle to have an extended attribute containing a resource fork or Finder info.

To see which files are causing this error, go to .app folder, normally is like: /Users/XXXX/Library/Developer/Xcode/DerivedData/MyProject-ckbzynxqjmstxigbdwwkcsozlego/Build/Products/Debug-maccatalyst/ (mine is Catalyst project) In Terminal,

cd 
xattr -lr .

You will see some files has extended attribute:

./MyProject.app/Contents/Resources/shopping_cart.png: com.apple.lastuseddate#PS: 00000000 BE 31 D5 5E 00 00 00 00 D0 40 FE 39 00 00 00 00 |.1.^.....@.9....|

Then go to your project folder or referenced folder for those files, remove extended attribute:

cd /Users/XXXX/Work/MyProject
xattr -cr .

After clean all referenced folders, go to Xcode and rebuild.