Security Update 2019-003 10.13.6 failing at shutdown
If you have an older Mac, you are stuck on macOS 10.13.6. A number of people have had problems installing Security Update 2019-003 10.13.6, where on shutdown the Mac hangs at a black screen with just the cursor visible, requiring a hard reset that doesn't complete the installation. Rinse and repeat, but no success
Quick solution to enable successful shutdown, but does not install Update:
Delete the files that trigger the patch installation on shutdown
https://apple.stackexchange.com/questions/188842/black-screen-with-cursor-on-logout-in-yosemite
Solution to clear and reset a whole load of "stuff", and get the update installed:
https://davidsimpson.me/2018/11/14/fixing-failed-macox-10.13.6-security-update-2018-002/
The above works for update 2019-003 as well.
And your story?
iMac 27", macOS 10.13
