Installing and Using the VMware Horizon Client & CAS VDI System on a Mac

UD COVID-19 Response

The University of Delaware has made class and lab software available in virtual computing sessions. These sessions are available to UD faculty and students.

By using the VMware Horizon Client, you can access needed software through a virtual desktop client on your computer. 

To learn more about this service, see our Class Software service page.

You must be logged in to the UD VPN to use this service.


Installing and Using the VMware Horizon Client on a mac OS Computer

  1. Log in to the UD VPN.
  2. In a web browser on your computer, go to https://vdi.art-sci.udel.edu/ and click the Install VMware Horizon Client panel.

VMWare client install dialogue with option to choose "Install VMware Horizon Client"

  1. On the Product Downloads page, under "VMware Horizon Client for Mac", click Go to Downloads.

Product downloads page with VMware Horizon Client for Mac "Go to Downloads" link.

  1. On the Download page, click the Download button.

Download VMware Horizon Client for macOS dialogue with "Download" button available.

  1. Find the download and run the installer, this varies by browser. In this example, from Google Chrome, clicking Open starts the installer.

Click "Open" on the downloaded file from Google Chrome.

  1. Click Agree on the setup dialog:

VMware license dialogue box with option to client "Agree"

  1. Drag the ‘VMware Horizon Client’ icon into the Applications folder:

Moving VMware Horizon Client to mac OS "Applications" folder

  1. Close the installer window. Then right-click the VMware Horixzon installer icon, and choose Eject VMware Horizon Client.

Menu with option to "Eject VMware Horizon Client" shows after right-click on VMware installer

  1. Open Finder and look for the ‘VMware Horizon Client’ in the mac OS Applications folder:

VMWare Horizon Client shows in the mac OS applications folder.

  1. Drag theVMware Hovizon Client icon to the mac OS dock if desired.

VMWare Horizon Client icon shows on the mac OS dock

  1. Run the client and click Open on the security dialog.

Security dialogue box with option to click "Open"

  1. Click Continue to allow access to local printers and USB devices. Enter your system password and click OK.
  • Note: If you are using a system managed by UDIT, you may need to complete these steps before step 12.

The "continue" button is available on the Start remote USB and Printing services dialogue box

Option to click "OK" to accept VMware Horizon Client changes.

  1. In the "Enter the name of the Connection Server" field, type vdi.art-sci.udel.edu. Then click Connect.

Field with vdi.art-sci.udel.edu entered as the connection server. Connect button is available..

  1. Read and accept the user notification. Be aware that the contents of this notification are important and will change over time. Messages regarding system maintenance and/or changes will be displayed here:

Information regarding saved files on the VDI system.

  1. In the logon box, enter your credentials, and click Login.
Students: Enter your full @udel.edu email address and password.  
  • If you type just your UDelNetID (no @udel.edu), you must change the ‘Domain’ selector to WIN
Faculty: Enter your full @udel.edu email address and password.  
  • If you type just your UDelNetID (no @udel.edu), you must change the ‘Domain’ selector to WIN

College of Arts and Faculty who use the VMware Horizon Client should continue to login with their CAS usernames with the ARTSCINET domain.

  1. If you only have access to one virtual machine option, a VDI session will start immediately. If you have access to more than one pool you will see icons depending on the course(s) you are enrolled in. Click the appropriate icon. When the session starts, click Allow to grant access to your local storage devices.

Sharing dialogue window with option to click "Allow"

  1. Once your session starts, you will be connected to a Windows 10 computer with the software you need installed. It should look similar to the screen below.

You may be prompted to Setup Your Storage. If you choose yes, the Kumo client, which can facilitate storage to Google Drive and OneDrive, will start. If you don't want to set this up, check the Don't ask me again box and choose Not Now.  If you do want to use cloud storage but do not want to use Kumo, you can set up Google Drive and One Drive clients.

Windows 10 VDI session. Windows desktop appears.

  • If you only have access to one virtual machine option, a VDI session will start immediately. If you have access to more than one pool you will see icons depending on the course(s) you are enrolled in. Click the appropriate icon. When the session starts, click Allow to grant access to your local storage devices.
  • The Mac Horizon client is highly flexible in terms of display settings. You can drag the corners of the window and the Windows VM will change resolution to match. Be careful to do this before starting applications, however, as many applications are not tolerant of having resolution changed mid-stream. To use your entire screen to work in the VM, click the Window menu Enter Full Screen.

Windows Menu selected with Enter Full Screen indicated

  1. While you are using it, this is “your” computer. You can save files, change settings, etc., without worrying about damaging anything or leaving anything behind for the next user. In fact,  it’s very important to know that any changes you make or files that you save on the VM will be gone forever when you log out! Therefore, you must make sure that you have saved your work to a personal storage device (USB drive or local drive on your own computer) or cloud storage location (Google Drive, Dropbox, Microsoft OneDrive) before you log out or disconnect from the VM!

Window icon in lower left corner indicated

  1. To save to your work to your local drive or a USB drive, you must have granted the access requested in step 15. Open Windows Explorer (folder icon) to access your files.

Windows folder icon indicated on taskbar

  • Your local drives and USB drives will be listed under ‘Devices and drives’. In the example below, ‘CMBOOT on MEDIA’ is a USB drive and ‘duggan on MEDIA’ is the user’s files on the client PC hard drive. These are both safe places to store your files. The drive labeled ‘Local Disk (C:)’, along with the ‘Desktop’, ‘Documents’, ‘Downloads’, ‘Music’, Pictures’, and ‘Videos’ folders, is the virtual drive in the VDI session which is destroyed when you log out.

Folders that you should and should not save to are indicated.

  1. When you are finished working in the VM and have saved your work to another location, log out of the VM. Click the Windows button in the lower left corner:

Windows start menu indicated

  1. Click the grey circle / person icon on the left and then click Sign out

Person icon and Sign out options are indicated


If you are using UD managed system, you may need to complete these steps after step 11. You need administrative permissions to complete these steps.
  1. After step 11, the "System Extension Blocked" window opens. Click Open Security Preferences.
Open Security Preferences button in "System Extension Blocked" window is indicated
  1. In the Security & Privacy Window, click the lock icon and enter your system credentials.
lock icon indicated
  1. In the Security & Privacy Window, click Allow.
Allow button is indicated
  1. The Legacy System Extension Window opens. Click OK.
Legacy system extension window with "OK" button indicated