Mac with Kensington SD4790P not working with DisplayLink

Martin_MWB · 03-18-2026, 02:36 PM

Hello,

I have DisplayLink Manager 15.1.0 (Build 51) installed on my MacBook Pro M2 (13-inch) with macOS Tahoe 26.3.1. When I connect the Kensington SD4790P I click to allow the USB device to connect to the docking station. I have two of the same LG monitors connected to the docking station both via HDMI. Only one monitor will work not both with the display link software. When I open the DisplayLink software on the Displays tab it always says "After connecting accessory to this Mac via USB, a system prompt may appear. Please click "Allow" to ensure this device is working properly." I click allow every time I connect the Kensington docking station. Any ideas on what is the problem?

Szymon · Yesterday, 02:42 PM

Hello,

Kensington SD4790P is a product using combination of technologies. It can drive up to 3 screens: 1x alt-mode + 2x DisplayLink. Observed behaviour suggests the only working monitor uses alt-mode standard.

Did you grant "screen recording permission" to DisplayLink Manager?
https://support.displaylink.com/know...ing-permission

Regards,
Szymon

Martin_MWB · Today, 12:47 PM

Yes, I have granted "Screen & System Audio Recording" to "DisplayLink Manager".

Szymon · Today, 02:07 PM

Then I'm afraid without logs we won't be able to troubleshoot it here.

Would you be able to follow this FAQ
https://support.displaylink.com/know...to-displaylink and raise a support request?

Regards,
Szymon

03-18-2026, 02:36 PM	#1
Martin_MWB Junior Member Join Date: Mar 2026 Posts: 2	Mac with Kensington SD4790P not working with DisplayLink Hello, I have DisplayLink Manager 15.1.0 (Build 51) installed on my MacBook Pro M2 (13-inch) with macOS Tahoe 26.3.1. When I connect the Kensington SD4790P I click to allow the USB device to connect to the docking station. I have two of the same LG monitors connected to the docking station both via HDMI. Only one monitor will work not both with the display link software. When I open the DisplayLink software on the Displays tab it always says "After connecting accessory to this Mac via USB, a system prompt may appear. Please click "Allow" to ensure this device is working properly." I click allow every time I connect the Kensington docking station. Any ideas on what is the problem?

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Yesterday, 02:42 PM	#2
Szymon DisplayLink Tech Support Join Date: Feb 2010 Posts: 277	Hello, Kensington SD4790P is a product using combination of technologies. It can drive up to 3 screens: 1x alt-mode + 2x DisplayLink. Observed behaviour suggests the only working monitor uses alt-mode standard. Did you grant "screen recording permission" to DisplayLink Manager? https://support.displaylink.com/know...ing-permission Regards, Szymon

Today, 12:47 PM	#3
Martin_MWB Junior Member Join Date: Mar 2026 Posts: 2	Yes, I have granted "Screen & System Audio Recording" to "DisplayLink Manager".

Today, 02:07 PM	#4
Szymon DisplayLink Tech Support Join Date: Feb 2010 Posts: 277	Then I'm afraid without logs we won't be able to troubleshoot it here. Would you be able to follow this FAQ https://support.displaylink.com/know...to-displaylink and raise a support request? Regards, Szymon