DisplayLink has released v.4.0.0 for OS X and macOS. Targus is recommending all MacBook users update to this version. This version is necessary for High Sierra and appears to work back to OS X 10.11.6.
Clamshell mode (built-in screen off while the lid is closed) requires a monitor to be connected to the Mac’s built-in video output even if other DisplayLink screens are available.
DisplayLink screens are not available at the first login screen when FileVault is enabled. (21278)
Protected content from iTunes and other players is not visible on built-in graphics when DisplayLink screens are connected. (17087)
The list of available resolutions and the default resolution for 4K displays depends on the type of connection (HDMI or DisplayPort). To see a more complete list of resolutions follow these steps:
– Open the Displays preference in System Preferences
– Go to the preferences panel for the DisplayLink screen
– While keeping the option (alt) key pressed, select the “Scaled” option for the list of resolutions.
The internal screen is kept active while in clamshell mode on OSX systems with a single HD3000 graphics card.
Manual Ethernet speed setting is not retained. (20973)
Limitations in macOS 10.13 High Sierra
Mirroring virtual screens is not currently supported in High Sierra. When attempting to mirror external screens, the Window Server may crash and/or all screens may blank.
“System Extension Blocked” message displayed after installation. This is expected since High Sierra due to a stricter security policy.
– After installation, macOS may require the DisplayLink system extension to be enabled in System Preferences -> Security & Privacy -> General. Click on Allow and restart the system.
– For more details please visit http://support.displaylink.com/knowledgebase/articles/1188004
Mac systems not supporting Metal will also be affected by the limitations in the following section. For a full list of compatible systems please see https://support.apple.com/en-gb/HT205073
Limitations in OS X 10.11, macOS 10.12 and macOS 10.13 on systems not supporting Metal
macOS 10.12 Sierra issues resolved in 10.12.x updates (latest tested 10.12.6):
– contents are not rendered correctly for windows moved to DisplayLink screens. Refreshing the window content when on the DisplayLink screen recovers. (23147)
– Safari not rendering correctly on DisplayLink screens. To work around this issue, activate the “Disable Full Page Accelerated Drawing” flag from the debug menu. (23445)
– Safari content crashing when displayed on DisplayLink screens. To work around this issue, activate the “Disable Full Page Accelerated Drawing” flag from the debug menu. (23714)
– Accessing Mission Control can crash the Window Server and log out the user without warning. (23832)
– Internal screen blank after resuming from sleep with password at wake up set.
Since 10.12.4, some systems show corrupted window contents in some applications (Word, Keynote, Parallels, VLC for example). (25191)
In 10.12 Sierra, missing rendering in Finder when “Displays have separate Spaces” is disabled in the Mission Control system preference. (24543)
– Enable “Displays have separate Spaces” to avoid this issue
In 10.11 El Capitan, screen corruption in mirror mode. (22112, 20255)
As a workaround for some of the corruption, select the internal screen in the “Optimize for” option in the Display system preference.
– This issue has been resolved in macOS 10.12 Sierra.
Manual Ethernet speed setting is not retained on El Capitan and later. (20973)
Forced user logout in full screen transitions, for example Show Desktop or Mission Control. (19924)
– This issue has been resolved in 10.11 El Capitan.
Slowness and general instability in mirror mode. (22322, 22356, 22128, 22141, 22114)
Logout caused by the Window Server crashing while minimising applications or changing monitor settings. (18862, 19060)
All screens black and unusable after unplugging a DisplayLink screen. This is caused by Apple’s Window server crashing. This can be recovered by replugging the DisplayLink device. (16155)
Some applications show corruption and/or wrong colours on specific UI elements, for example window controls, tabs and menus. This is due to transparent rendering in Mac OS 10.10 and later. (23151)
– To work around this issue, open System Preferences->Accessibility and enable the “Reduce transparency” option.
Since OS X 10.10 Yosemite some Carbon applications can show corruption around the edges of windows. (18064)
Misplaced or missing menu items on the DisplayLink screen. Changing the resolution of the external screen can sometimes resolve the issue. (16480, 16744)
On some systems fast user switching fails when DisplayLink screens are connected. (16153)
Sometimes when DisplayLink monitor is set as primary after waking up from sleep it is disconnected and there is no login screen visible. (16149)
Corruption on the screen may be visible while rotating DisplayLink displays. (16151)
Cannot interact through Screen Sharing with Mac with DisplayLink screens. (25040)
Since OS X 10.9.3, the desktop contextual menu is sometimes not available on DisplayLink screens. (17086) To avoid this issue:
– Disable “Display have different spaces” option
– In case “Display have different spaces” is active, temporarily move the dock to the extended screen at least once after connecting the DisplayLink screens
Some applications can show corruption and/or missing contents while updating windows contents. Examples are Maps, iBooks, FaceTime, the Dock and the menu bar. (16365, 15855, 15778, 17092, 19068)
– The Dock issue has been resolved in Yosemite 10.10 (15778).
Known issues and limitations
Not all display modes are available for rotated DisplayLink screens. (13464)
Retina resolutions on DisplayLink screens may result in reduced performance. For higher performance use the screen at its native resolution. (21314)
Screen corruption while mirroring multiple DisplayLink screens. (15633, 16121, 17077)
Some color calibration applications may not be able to affect DisplayLink screens.
Some options in the Accessibility system preference have no effect on DisplayLink screens, for example â€œInvert coloursâ€ and contrast settings.
Some advanced DL-41xx features are not supported on the macOS platform: On Screen Display, splash screen and connection status feedback.
The full release notes are here.