DisplayLink has worked for many months to maintain support for its users during the transition from macOS High Sierra to Mojave. While functionality such as Ethernet and audio or charging, where implemented, is unaffected on all releases, display connectivity has been limited on macOS releases from 10.13.4 through 10.13.6.
Users with access to Apple 10.14 Mojave previews released since 30th July confirmed full support was restored for multiple extended DisplayLink displays.
We are performing wide scale testing of v5.0 beta released today against current and upcoming previews to release v5.0 upon general availability of 10.14.
Driver v5.0 Beta: http://www.displaylink.com/downloads/file?d=191
Users on High Sierra 10.13.4-10.13.6 should install the newly published v4.3 as the workaround to enable one extended USB display now supports additional resolutions.
An FAQ details how to enable Apple AirPlay with DisplayLink display for extend or mirror mode is available here: https://support.displaylink.com/knowledgebase/articles/1854724.
DisplayLink driver v4.3 released today is also applicable to Mac OS X 10.12 and other macOS 10.13 versions.
Driver v4.3: http://www.displaylink.com/downloads/file?d=190
Some MacBook 2018 models on 10.14 previews may experience black extended display(s) with only mouse cursor. DisplayLink driver v4.3 Beta 6 stays available to force an AirPlay extended display on these machines until a fix is distributed.
Driver v4.3 Beta 6: http://www.displaylink.com/downloads/file?id=1184
* What's the difference between clone and mirror?
With mirror, the screen is part of the user-controllable display settings and the user can choose which screen to use as the source. This affects resolutions and aspect ratio chosen for mirroring.With clone the source is always the current main screen resolution and no display controls are available to the user. The DisplayLink screens will scale and/or letterbox as necessary.