Update 11/1/2019:

ITS recommends that users install the security update and let the update install in its entirety. Please do not force shutdown or turn on the device during this time unless it lasts longer than 15 minutes. 

Please note: users do not need to wipe their computers and start fresh in order to run this update.  This is ONLY the case when a user interrupts the security update.

Original Post 10/31/2019:

There have been reports with Apple’s latest macOS Mojave security update (Apple Security Update 2019-001) causing the local storage volume to become corrupt if users interrupt the update process. If the update process is interrupted, the device could become corrupted and render the user unable to login, as well as unable to retrieve any files.

During the update process the device may appear to shutdown, but is in fact completing the update. Please do not force shutdown or turn on the device during this time unless it lasts longer than 15 minutes with nothing appearing on the screen. The only known fix at this time is to completely wipe the machine and re-install the operating system. ITS strongly recommends that you have your system and data backed up with one of Denison’s recommended file storage and backup tools before you initiate the security update.

Apple has been notified of the issue and we are working closely with them to reach a resolution.

It is important to apply this security patch to ensure your computer remains current and secure. Please plan a time to complete the update where you will not need immediate access to your machine (e.g.; after hours, during a meeting, etc.).

If you have any questions, please contact the ITS Help Desk at helpdesk@denison.edu or 740-587-6395.