How can I disable the "No Backups for x Days" from Time Machine? Since I updated to High Sierra, I frequently get the "No Backups for x Days" notification. I used to be able to make this go away by turning off Time Machine in the System Preferences until I needed it, but there is no way to turn Time Machine off anymore. How can I get rid of these notifications?
Figured out the completely non-obvious solution. In the Time Machine preferences you have to right-click on the drive icon and then select "Stop Using {Drive Name} for Backup".



Extremely terrible UX, but at least it's doable!