I am asked to type in the system admin user name and password when I compile my Xcode project. The whole message is
Mac OS X wants to make changes. Ty
Open Keychain Access
Click on System in left pane
Unlock the System keychain top left (if it is locked)
Sort the System items by Kind so that the keys are at the top
Look for the private key that keeps asking for password
Double click on it and choose Access Control
Choose "Allow all applications to access this item"
Save changes, lock the System keychain and quit the Keychain app
Restart the application that keeps asking to modify your keychain