Legacy macOS Silicon Motion Driver Installation Instructions

Last Update: February 16th, 2022
Article ID: 1255344

'Legacy' Silicon Motion Driver installation for macOS 10.14 Mojave

** Before you begin **

If have installed a previous version of the Silicon Motion driver, please uninstall it and then reboot your system before proceeding.

1. Download the latest driver for macOS 10.14 Mojave from here -> Link

2. Navigate to your Downloads folder and double-click on the Silicon Motion driver download

3. The disk image of the driver will mount, and automatically open the Silicon Motion Installer main landing page

4. Double-click on the ‘SMI USB Display Driver Installer.pkg’ file. The SMI USB Display Driver Installer page will open

SMI Driver Installation step 2

5. Click ‘Continue’ at the Introduction step

SMI Driver Installation step 3

6. Click the ‘Continue' at the Read Me step. 

Note: This Read Me step mentions that the Silicon Motion software must be allowed in the macOS Security & Privacy settings - this is an important step starting in Step x of these instructions

SMI Driver Installation step 4

7. Click ‘Install’

SMI Driver Installation step 5

8. Enter your system password and click the ‘Install Software’ button

SMI Driver Installation step 6

10. Click 'Continue Installation'

SMI Driver Installation step 7

11. Click on the ‘Open Security Preferences’ button 

SMI Driver Installation step 8

12. Click the ‘Allow’ button at the bottom of the window to grant permission for the extension to be loaded.

** Important note – this approval must be granted within 30 minutes of the driver installation or the process will not work. A fresh installation must be performed to reset this timer. **

SMI Driver Installation step 9

There is also a chance that the warning message about the blocked System Extension will not appear, but macOS may still block the extension. After the driver installation completes, please double-check that the necessary approval was granted by clicking the ‘System Preferences’ icon (the gear) and then clicking on the ‘Security & Privacy’ icon. From the window that appears please ensure the Silicon Motion driver is Approved by clicking the ‘Allow’ button.

12. Close the ‘Security and Privacy’ window. The Silicon Motion installation should now complete

13. You may also elect to move the Silicon Motion driver installer to the Trash Bin by clicking 'Move to Trash' or you may keep it by clicking 'Keep'

SMI Driver Installation step 10

'Legacy' Silicon Motion Driver removal for macOS

1. Download the Silicon Motion driver package for macOS 10.14 Mojave from here -> Link

2. Navigate to your Downloads folder and double-click on the Silicon Motion driver download

2. Double-click on the 'SMI USB Display Driver Uninstaller' to begin the uninstallation wizard

SMI Driver UnInstallation step 1

3. Click the ‘Uninstall’ button

SMI Driver UnInstallation step 2

4. Enter your account password and click ‘OK’

SMI Driver UnInstallation step 3

5. After a few moments the process will complete. Click the ‘Restart’ button to complete the removal process.

SMI Driver UnInstallation step 4