richardmoncriefkoch at icloud.com
Tue Mar 19 04:19:03 CET 2019
The dialog in MacTeX-2019 is the Welcome dialog of the installer. I caught the error shortly after uploading MacTeX-2019, and the current welcome says "This package requires mac OS 10.12 or higher." I haven't bothered uploading a new version of MacTeX because you can use TeX Live Utility to update to the latest stuff. Note this message isn't in any TeX Live software; it is just in my Apple Install Package.
More information about the tex-live