And apple failed to release an update to this version of macos such that the format is no longer readable.

I 'feel' (hahaha, no data to support this) like the format for. dmg and fails with 'detaching because no mountable filesystems.' This same message is displayed for both the dropbox updates as well as the apple system update (SecUpd2019-003HighSierra.dmg). It turns out that in this state, the os is unable to open a. The issue that triggered the wave of triage, is that Dropbox needs to be manually upgraded by downloading a new version.

After which he stated he couldn't help me and I should go to an Apple Store for support.

All of the above again, with a support tech in chat.

Fixing disk issues in repair mode (none were found).

Manual download and install of the update.

You can try updating again in the App Store after restarting.

It gets ~5% through a progress bar then pops up an error message: The update was not installed successfully.The current pending update is 'Security Update 2019-003-10.13.6.' When I attempt to install the update: I'm having difficulty installing the latest update on my Mac Mini from 2011 (macmini5,3).

Mac high sierra updates