DisplayLink macOS Software. DisplayLink Manager is a new way to enable your DisplayLink dock, adapter or monitor on macOS platforms. It's an application that combines our latest driver with features that streamline the setup of mutliple displays up to 4K. Change monitor input to DP ALT to connect the monitor via USB-C You will need to change your display input to DP ALT if you are connecting your computer using USB Type-C. Press the Menu key on your monitor, then change the display input setting to DP ALT. Operating system File Name File Size File Version; Adobe PostScript3 Printer Driver (Mac OS 8.6 through 9.2.2 / Installer) US.sea.hqx; 2,375KB: Ver 8.8: Mac OS 8.6 through 9.2.2.
Before you begin
You can resolve many display issues by updating the software on your Apple devices, cables, and adapters. If you can see an image on your screen, check for software updates using the Mac App Store:
- Connect your external display and any Apple video cables or adapters that you use with it.
- From the Apple menu, choose App Store.
- Click the Updates button in the App Store window.
- Install any macOS or firmware updates that are listed.
If you're using a display, hub, extender, or adapter not made by Apple, check with the manufacturer for any updates that might be available.
If you're trying to connect a 4K display or Ultra HD TV with your Mac, make sure your computer meets the requirements for using these external displays.
If your software and firmware are up to date, or if you can't see the image on your screen, try the steps below for your specific issue.
If the display image is blank or unusable
Try these steps if you don't see an image on your display. These steps can also help if the image on your screen repeatedly turns on and off (flickers), if horizontal lines appear (snow), or if the image is distorted (torn or scrambled).
These steps likely won't help if the issue is only happening in one app. If you see similar issues in only one window or app, check with the app's developer for updates or more help.
Check connections
Check the connections to your Mac and external displays:
- If you're using an Apple notebook, try connecting its power adapter.
- Make sure the external display's power cable is securely connected and that your display is turned on.
- If you're using a Mac Pro (Late 2013) make sure your displays are connected to the right ports.
- If you're using a display hub, switchbox, or 'KVM,' try connecting your display's video cable directly to your Mac instead.
- Disconnect the video cable where it plugs into your Mac, then plug it back in to reseat the connection.
- If you're using a video adapter, unplug the video adapter from your Mac, then plug it back in to reseat the connection.
- If you're using more than one video adapter to connect your display (the adapters are 'chained' together), try connecting the display using only one adapter if possible. Some video adapters can't be connected together. For example, a mini DisplayPort to DVI adapter can't be connected to a DVI to HDMI adapter.
- If your display has more than one video connection, see if using another connection on the display works. If possible, check to see if using a different display or a different adapter works.
- Try using a different cable that you know is in working order. Check with the display's manufacturer to make sure you're using the cable they recommend.
- Restart the Mac with the display connected.
Detect your display
If you're using an external display, sleep and wake your Mac to make it check for connected displays:
- Press the power button on your computer to put it to sleep, or choose Apple menu > Sleep.
- Wait a few moments, then press a key on your keyboard or click your mouse or trackpad to wake your Mac.
If you're using more than one display, and you can see the image on one of the displays, you can also use Displays preferences to check for connected displays.
Adjust video settings
If there's no image on your display, try adjusting your display's brightness or contrast. If there's still no image, or the image appears torn or scrambled, try selecting a different video resolution in System Preferences.
Adjust brightness
- If you're using an Apple Display, press the increase brightness key on your Apple keyboard. To adjust the brightness of a secondary display, press Control-F2.
- If you're using a display that's not made by Apple, check the documentation that came with your display to see if it includes built-in controls for adjusting its brightness or contrast.
Change your display resolution
- From the Apple menu, choose System Preferences.
- Click the Displays icon.
- Click Default for display. If you see more than one resolution listed, choose a resolution and refresh rate. If the display turns off when you change resolutions, press the escape key to undo the change.
If you can't change the resolution of your display because you can't see an image, restart your Mac in safe mode to reset the display resolution to defaults.
If starting in safe mode doesn't resolve the issue, reset your Mac's NVRAM and SMC to reset the video ports on your Mac to their defaults.
Check for third-party display software
If your display works only when your Mac is started in safe mode, and you have display-related software installed, check with the software's developer for updates, or try temporarily uninstalling it.
If an image appears fuzzy or blurry
If images or text on your display appear pixelated or blurry, check these things.
Check your display resolution
Make sure your display resolution in System Preferences is set to its default. If you're using a resolution that's scaled, the image might be magnified to fit the display. This can cause the image to look blurry in some apps.
- From the Apple menu, choose System Preferences.
- Click the Displays icon.
- Select Default for display.
If you use a monitor or an HDTV connected with an HDMI cable, you might see a difference in video quality if your display is set to television mode. Check your display for a 'monitor mode' setting to get the best video quality.
Retina displays
If an app you're using appears low resolution on your Retina display, check to see if an update to the app is available. Most apps have been updated to use the higher pixel densities of Retina displays.
Lower-resolution images on some web pages might also appear 'softer' when viewed on a Retina display. This is because Retina displays have a higher pixel density and not all websites use Retina-ready images.
For example, the images below look different when viewed on a Retina display, but the same on a non-Retina display. This happens because the Retina-ready image has a higher pixel density:
If you see contrast or color issues
If your entire display image seems too dark or too bright, you can adjust the brightness and contrast from the Displays pane of System Preferences, or by using your display's built-in controls.
Adjust brightness and contrast
To adjust the brightness of your Apple display, press the brightness key or F2 key on your keyboard. You can also use the brightness adjustment for each connected display in System Preferences > Displays.
Displays not made by Apple sometimes have brightness and color adjustments built into the display. Check the documentation for your display to see if it includes built-in controls.
When you connect a display, projector, or HDTV using an HDMI cable, you might see a difference in video quality if your display is set to television mode. Check your device for a 'monitor mode' setting to achieve the best video quality.
You can also calibrate each display from the Color tab of Displays preferences to get the best color and brightness from your display.
If you see bright or dark pixels
If individual pixels on your display seem too bright or too dark, see these articles for more help:
Connecting displays with Thunderbolt 3 (USB-C)
The Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter connects Mac models with Thunderbolt 3 (USB-C) ports to older devices that use Thunderbolt (10Gbps) or Thunderbolt 2 (20Gbps). For example, this is the adapter that you should use to connect your MacBook Pro to an Apple Thunderbolt Display or a third-party Thunderbolt 2 storage device.
This adapter doesn't support connections to Mini DisplayPort displays, including the following Apple adapters and displays:
- Apple Mini DisplayPort to Dual-Link DVI Adapter
- Apple Mini DisplayPort to DVI Adapter
- Apple Mini DisplayPort to VGA Adapter
- Apple LED Cinema Display
If you're using the Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter to connect to a compatible display and the display doesn't show an image, try unplugging the adapter and plugging it back in.
Get more help
If you've tried these steps and your display still isn't working, contact Apple Support to get more help.
Diagnostic fees may apply for issues not covered under warranty or the AppleCare Protection Plan (APP).
-->Windows versions:
- Windows 10 for desktop editions (Home, Pro, Enterprise, and Education)
- Windows 10 Mobile
Common points of discussion for OEMs who want to build Windows systems with USB Type-C connectors.
USB Type-C connector features
Symmetric and reversible design
- The connector is symmetric. The cable has a USB Type-C connector on each end allowing the host and function device to use USB Type-C connectors. Here is an image that compares the connectors:
- The connector is designed to be reversible. Traditional connectors had to be connected the 'right-side-up'. With the reversible design, the connector can be flipped.
Supports all USB device speeds
The connector can support USB devices that are low-speed, full-speed, high-speed, SuperSpeed (including SS+).
Alternate modes
The connector can support alternate modes. The alternate mode feature allows non-USB protocols to run over the USB cable, while simultaneously preserving USB 2.0 and charging functionality. Currently, the most popular alternate modes are DisplayPort/DockPort and MHL.
- DisplayPort /DockPortThis alternate mode allows the user to project audio/video to external DisplayPort displays over a USB connector.
- MHLThe MHL alternate mode is allows the user to project video/audio to external displays that support MHL.
- Billboard error messagesIf a user connects a USB Type-C alternate mode device or adapter that is not supported by the attached PC or phone, the device or adapter can expose a Billboard device that contains information about the error condition to help the user troubleshoot issues.
- Increased power limitsA system with USB Type-C connectors has higher power limits, it can support up to 5V, 3A, 15W.Malayalam kundi kathakal free download. In addition, the connector can optionally support the power delivery feature as defined by the USB Power Delivery OEM . Peh mcquay centrifugal chiller service manual. If the connector supports power delivery, a USB Type-C system can be a power source provider or a consumer and support up to 100W.
- Supports USB dual rolesPeripheral devices can connect to a mobile system with USB Type-C connectors, changing the traditional role of a mobile system from function to host. When the same system is connected to a PC, the system resumes the role of a function and PC becomes the host.
Operating system input into which alternate mode needs to be negotiated, such as DP 2-lane vs. DP 4-lane
No. The operating system (or any Microsoft-provided software component) plays no part in selecting an alternate mode. The decision is made by the driver for the connector, specifically the USB connector manager (UCM) client driver. The driver does so by communicating with the connector's firmware by using hardware interfaces.
Pre-OS charging with Type-C and PD
Enabling pre-OS charging is owned by the OEM. You can choose to not implement USB Power Delivery, and charge at USB Type-C power levels until you boot into the operating system.
Charging the phone when it is a USB host to enable docking scenarios like Continuum
Here are a few things to consider:
- You must to implement USB Power Delivery, so that power and data roles can be swapped independently.
- Your dock’s upstream port should be implemented as a Charging UFP, defined in the USB Type-C specification. For details, see section 4.8.4, version 1.1.
- Your dock should request a DR_Swap if it resolved to a DFP, or a PR_Swap if it resolved to a UFP.The initial DFP is the power source, so you must change the data role. The initial UFP is the power sink, so you must change the power role. You can perform those operations in your implementation of these callback functions:
Windows 10 Mobile support of USB billboard devices
Yes, if you connect the phone to a device that supports a USB Billboard, as per the USB Device Class Definition for Billboard Devices specification, the user is notified. Your USB connector manager (UCM) client driver is not required to handle the notification. If your system does not recognize the alternate mode, do not enter the mode.
Support for USB Type-C on earlier versions of Windows
USB Type-C is not supported on versions of Windows prior to Windows 10.
UCSI support on earlier versions of Windows
UCSI is not supported on versions of Windows prior to Windows 10.
How to test an implementation of UCSI
To test your implementation, follow the guidelines given in USB Type-C manual interoperability test procedures. We recommend running USB tests in Windows Hardware Lab Kit (HLK) for Windows 10. These tests are listed in Windows Hardware Certification Kit Tests for USB.
Conditions and UI for the different errors
Windows 10 can show a set of USB Type-C error messages to help educate users about the limitations with different combinations of USB Type-C hardware and software. For example, the user might get 'Device is charging slowly' message if the charger connected to the USB Type-C connector is not powerful enough, not compatible with the system, or is connected to a non-charging port. For more information, see Troubleshoot messages for a USB Type-C Windows system.
Connecting a non-PD port to a PD provider and a PD consumer to a system that is not a PD provider
The non-PD port attempts to charge the system by using USB Type-C current levels. For more information, see USB 3.1 and USB Type-C specifications.
Connecting Thunderbolt, SuperMHL, or PCI express to a PC that does not support those capabilities
The alternate mode feature allows non-USB protocols (such as Thunderbolt, SuperMHL) to run over the USB cable, while simultaneously preserving USB 2.0 and charging functionality. If a user connects a USB Type-C alternate mode device or adapter that is not supported by the attached PC or phone running Windows 10, an error condition is detected and a message is shown to the user.
- If the device or adapter exposes a Billboard device, the user sees information about the error condition to help the troubleshoot issues. Windows 10 provides an in-box driver for a Billboard device and notifies the user that an error has occurred.
- The user might see an error notification, 'Try improving the USB connection'. For more information, see Error messages for a USB Type-C Windows system.
For the best results, make sure that the alternate mode device or adapter’s requirements are met by PC or phone or cable.
Support and limitations for MTP over USB Type-C in Windows
Windows 10 for desktop editions supports MTP in the initiator role; Windows 10 Mobile supports MTP in the responder role.
How downstream devices and hubs connect and communicate with USB Connector Manager (UCM)
UCM is its own device stack (see Architecture: USB Type-C design for a Windows system). Windows 10 support for USB Type-C includes the required plumbing to make sure that the different class drivers know how to communicate with the different USB Type-C connectors. In order to get Windows 10 support for USB Type-C, you must plug into the UCM device stack.
USB Type-C MUTT requirements for HLK tests
The Windows HLK for Windows 10 contains tests for USB host and function controllers. To test your system, use a USB C-A adapter. These tests are listed in Windows Hardware Certification Kit Tests for USB.
Microsoft support for P2P data transfer between the same Windows 10 SKU
This is not a valid connection.
- You cannot connect two PCs running Windows 10 for desktop editions.
- You cannot connect two mobile devices running Windows 10 Mobile.
If the user attempts to make such a connection, Windows shows an error message. For more information, see Error messages for a USB Type-C Windows system.
The only valid connection is between a Windows Mobile device and Windows desktop device.
UCM class extension (UcmCx) communication with PMIC or battery driver to get/set charging status
On software-assisted charging platforms, UcmCx communicates with PMIC and the battery subsystem. The client driver may determine the charging levels by communicating with the hardware through hardware interfaces. On hardware-assisted platforms, the embedded controller is responsible for charging. UcmCx takes no part in the process.
HLK support for USB Type-C
In Windows HLK for Windows 10, there are no USB Type-C specific tests. We recommend running USB tests in Windows HLK for Windows 10. These tests are listed in Windows Hardware Certification Kit Tests for USB.
UCSI
Dp Alt Driver Download
USB Type-C Connector System Software Interface (UCSI) Specification describes the capabilities of the USB Type-C Connector System software Interface (UCSI), and explains the registers and data structures, for hardware component designers, system builders, and device driver developers. Get the specification from this site.
Microsoft provides an in-box driver with Windows, UcmUcsi.sys, that implements the features defined by the specification. This driver is intended for systems with embedded controllers.
Test a UCSI implementation running on Windows 10
We recommend running USB tests in Windows HLK for Windows 10. These tests are listed in Windows Hardware Certification Kit Tests for USB.
Test a UCMCx client driver on Windows 10
We recommend running USB tests in Windows HLK for Windows 10. These tests are listed in Windows Hardware Certification Kit Tests for USB.
VBus/VConn control and role switch operations handled by the UCM class extension
Dp Alt Mode
The UCM class extension might get requests from the operating system to change data or power direction of the connector. When it gets those requests, it invokes client driver's implementation of EVT_UCM_CONNECTOR_SET_DATA_ROLE and EVT_UCM_CONNECTOR_SET_POWER_ROLE callback functions (if the connector implements PD). In the implementation, the client driver is expected control the VBUS and VCONN pins. For more information about those callback functions, see Write a USB Type-C connector driver.