Stumbled across this error during Delphi XE7 iOS deployment:
Unable to mount developer image (e800000e).
Solution:
reinstall Xcode command line tools with
xcode-select --install
A software update popup window will appear, click Install, agree to the Terms of Service and wait for the Command Line Tools package download to complete. Reboot your Delphi PC as well as your Mac.
If the deployment still fails, manually delete the application from the iOS device, restart the device, the PAServer and Delphi.