Thunderbolt Dual HDMI 2.0 Adapter
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Driver (1)
IDDownload TitleDownload LinkPost Date
1264 TWIN25G/TWIN10G SFP28 Software [macOS 15.6+] 4.2.2July 25, 2025
Operating System Requirements: macOS 15.6+
Description: This is the application (Sonnet Network) that installs the driver to enable the use of Sonnet TWIN25G and TWIN10G SFP28 Thunderbolt adapters, and TWIN25G and TWIN10G SFP28 PCIe cards with Mac computers running macOS 15.6+.

Important Notes:
• Use version 4.1.2 for macOS 13.2-14
• Use version 4.2.1 for macOS 15.4
• This application must be installed into your computer’s Applications folder to run. Do not delete the application after use; doing so will delete the Sonnet driver.
• This version provides compatibility with macOS 15.6+.
 
 
Firmware (0)
No Firmware was found for product.
 
Manual (2)
FAQ (10)
IDArticle TitlePost Date
978 Sonnet's macOS-compatible external graphics supports up to 5 displays. How can I tile them into one large display?Jan-06-21
990 I connected to my HDMI TV and the screen is black.Jan-15-18
1001 My display is not being detected on macOS.Jun-21-21
1004 How to Solve the DP No Video / Wrong Resolution Issue with the Dell P2715Q / P2415Q Flat Panel MonitorsJun-21-21
1023 My Thunderbolt 3 to Dual DisplayPort Adapter is not working with two monitors.Aug-01-18
1024 My computer supports two 4k displays, but only one of my MST 4k displays works at a time.Aug-02-18
1036 Does the Thunderbolt 3 to Dual HDMI 2.0 Adapter support active cables?Nov-24-18
1037 Can I use the Thunderbolt 3 to Dual HDMI 2.0 Adapter with an HDMI Switch?Nov-24-18
1098 My Dual DisplayPort or Dual HDMI Adapter stopped working after the macOS 10.15.6 update.Mar-30-20
If you have a Mac with the T2 security chip:
• iMac Pro
• Mac Pro introduced in 2019
• Mac mini introduced in 2018
• MacBook Air introduced in 2018 or later
• MacBook Pro introduced in 2018 or later

The Sonnet Dual DisplayPort or Dual HDMI Adapter may stop working after the 10.15.6 update. You can try using the Startup Security Utility to set External Boot to "Allow booting from external media." If this is already set, you must set it to "Disallow booting from external media", restart, then set to "Allow booting from external media", and restart.

This issue does not affect all configurations and we cannot reproduce the issue. Please let us know whether you have this issue and whether this procedure solves it for you.
 
1256 My display is not being detected on macOS.Jan-06-25