"Updates not installed" after updating all applications in app store after 4 months I turned on my MacBook Air [2015] and first off all I tried install JDK 8 and Eclipse for developing python.  after all things done, I notified by app store update notification so I clicked to update all of applications. but this things happened.


after downloading all files, iTunes 12.8.2, Safari 12.0.3 and Security Update 2019-001 10.12.6 it shows this message:
ok, now everything is good and waiting for progress bar to complete:
and after downloading things wait for restart:
it shows OS update progress:
and error happened : 
MacBook restarted and go to MacOS again
and now this message showing up:
and now if i click on install, it goes to step one again. and everything repeated as I said in this list.


Machine Specs:


MacOS Sierra 10.12.6
MacBook Air (13 inch - early 2015)
8Gb DDR3
and about 20Gb free space
Somehow your installed copy of Safari became corrupted.

Delete Safari, then reinstall your current version of macOS.  That will reinstall a good copy of Safari, and then you should be able to install any updates.