With all the excitement of yesterday’s iOS 11.3 release, you may not have noticed that Apple also unleashed macOS 10.13.4 on the world. The latest Mac update includes a bunch of smaller fixes, with a focus on “stability, performance, and security,” but if you’re using Duet Display you should avoid the newest version…
Source: LifeHacker – Don’t Update to macOS 10.13.4 If You Use Duet Display