1 system updates macjave update has failed:
2 solutions to: Restart the Mac, hold down Command + R and enter recovery mode, find the Terminal enter csrutil disable, and then restart the Mac, download and install the update again.
3 system update, be sure to remember to restart the Mac again into recovery mode (hold down the restart Command + R), find the Terminal and enter csrutil enable, and then reboot the system, you're done!