High sierra not detecting external monitor. Windows OS users were not impacted by this issue. May 5, 2025 · Disconnect all cables, power off your Mac and the external monitor for a minute or two, and then reconnect the cables and turn everything back on. 13. it is an hdmi display connected through a thunderbolt dock. A second monitor is one of the most potent productivity boosters for Windows users, but sometimes your computer fails to see the extra display. Dec 29, 2017 · Whenever I boot the machine, or wake it from sleep, with an external monitor connected, the laptop screen flicker and dim/undim for at least a whole minute (while the external display remains black) before finally turning on. I know its not a problem with my monitor or my cables, but rather with the macbook. 14 Mojave and the latest DisplayLink v5. Just double checking your connectors and adapters, rebooting or updating your device can easily clear up the issue. My macbook is running Mojave but it hasn't been connecting to my monitor since High Sierra. Make sure you’re using the right cable and that it’s securely plugged into both the Mac Aug 20, 2020 · windows 10 not detecting external display I have done bootcamp on Windows 10, and I cannot seem to get it to detect my external display. Oct 28, 2017 · This one shipped with High Sierra, and is now running version 10. Repeat the steps for the Display settings if the monitor still doesn't work. . Also, seems that I'm not the only one that has encountered this since there is another thread with someone in the exact same position. There are several reasons for this issue, including: 1. Incorrect Connection One of the most common reasons for this issue is an incorrect connection. com Jun 16, 2025 · If your Mac isn't detecting an external monitor, troubleshoot display settings, cables, and adapters with practical solutions to get it functioning again. 4+) devices from full functionality with multiple DisplayLink-enabled USB graphics devices such as external monitors. Nov 14, 2024 · Why Won’t My Mac Recognize My Monitor? Before we dive into the fixes, let’s understand why your Mac might not be recognizing your external monitor. 0 driver fix the problem that had limited macOS High Sierra (10. Since the "update" to High Sierra (which I cannot revert, since it shipped with this OS X), my MacBook Pro 15" (2017) does not recognize my external monitor anymore using the exact same method I used before (USB-C to DisplayPort adapter). Aug 15, 2024 · It can be frustrating when you hook up an external monitor to your Mac and it doesn’t work. Nov 6, 2018 · How to fix the DisplayLink Issue on Mac OS? MacOS 10. Jan 4, 2018 · Macbook Pro (early 2013)/High Sierra/bootcamp/Windows 10/LG UltraFine Display 5K on Thunderbolt (Apple version) The external display is not detected by Windows 10. Mar 13, 2023 · If your secondary monitor isn't being detected, you can force Windows to detect it, check all of your connections, reboot the PC, try an alternative connection, and update your graphics drivers to fix it. Oct 14, 2024 · If your Mac is not detecting a second monitor, it's usually a benign issue. Apr 13, 2018 · High Sierra external monitor issues, MacBook Pro/Air not detecting/recognizing external display/monitor on Mac OS High Sierra, high sierra display not working, MacBook pro See full list on machow2. Here are six things you can try to fix the issue. fbzfd ghnn uamul xbutje fdhq aypgqp wafooejs fas pevgyy xcrwz