2/11/2024 0 Comments UDock for mac instal![]() Many modern monitors, especially those from well-known brands, might have user-updatable firmware that you can update to resolve the issue of Mac not detecting external monitors. However, if your external display shows no signal when connected through an HDMI cable, try a USB-C cable. You'll also need an adapter if your Mac doesn't have an HDMI port. Be reminded that some Mac models have an HDMI 2.0 port, which only supports 4k resolutions at 60hz. If your Mac can't detect the external monitor through the USB-C or Thunderbolt port, use an HDMI cable instead. What this does is reset the old monitor display information stored on the cable, stopping it from interfering with the detection. When purchasing a SuperSpeed+ USB cable, ensure it has the official USB certification logo and the term "certified."įully disconnecting your data cable at both ends and flipping it around is another trick you can use when the external display is not detected on your MacBook Pro/Air or desktop Mac. Such a cable can transfer data at up to 10 Gbps, double the speed of USB 3.0 (or USB 3.1 Gen 1) which transfers data at 5 Gbps. Your cable may work fine in previous macOS but macOS Sonoma may have become stricter about the quality and accuracy of data being sent to displays, rendering your old cable unusable.Ī high-resolution (4K and above) display like the LG Ergo 32un880 requires a USB cable that has been officially certified to meet the standards and specifications of USB 3.1 (often known as SuperSpeed+ or USB 3.1 Gen 2). Your Mac won't recognize an external monitor if the cable you use to connect them is faulty. ![]() We've gathered several useful fixes for you to try when your iMac, Mac mini, Mac Pro, or MacBook does not recognize external monitors after installing the macOS Sonoma update. Mac not detecting external display/monitor on macOS Sonoma? FAQs about macOS Sonoma external display not working External monitor not working in clamshell mode? DisplayLink Manager not detecting monitor on Mac? Desktop Mac or MacBook only detecting one monitor? If you're also having trouble with issues like Mac not detecting external displays, this article gets you covered. The affected monitor brands include LG, Dell, Portable Tri-Screen, BenQ, Samsung, Acer, Sceptre, Philips, etc. The issues are diverse but mainly concerned about Mac not recognizing external monitors after the Sonoma update. External displays flicker when the refresh rate is higher than 144hz.External displays get detected by Mac but don't display anything.Mac not detecting USB C monitor but charges it fine.External monitors staying blank in clamshell mode.No DisplayLink-enabled display detected on Mac.External monitors connect and disconnect when connecting via USB-C.MacBook not recognizing external monitor via USB C after the monitor is powered off and on.USB C monitor not turning on after the MacBook lid is closed in clamshell mode.macOS Sonoma not detecting external monitors on M2 MacBook Pro after going to sleep.MacBook Pro not recognizing external monitors connected via HDMI to HDMI. ![]() ![]() Mac not detecting external monitor when the refresh rate is set to 60hz.MacBook Pro only recognizing one monitor.
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