The HooToo USB hub Im using (translates USB-C to HDMI), Or High Sierra running on a 2016 12' MacBook. I've also tried opening the display settings, holding down the alt key, and clicking "Detect Displays". The monitor and HDMI cable are definitely fine, so the problem may lie in. But now the only way to consistently fix the issue is to restart the MacBook. It used to be that when this happens, I manually put the MacBook to sleep and wake it up again, and voila, it would detect the external display again. ![]() I use the MacBook at home as well as at work I've tried different ports on my computer, different cables, and different monitors the issue is with the MacBook itself. I'm using a Mini DisplayPort to DisplayPort cable. The problem is that everything is super-small, I guess because of the 4K. I bought an ASUS VP28U (4K), connected it with an HDMI to USB-C adapter and, generally, it works. ![]() ![]() I come back, and no matter what I try, the only way for the MacBook to detect the external display again is to restart the computer! I have a MacBook Pro 2016 (with Thunderbolt 3 ports on macOS 10.13.6) and I need an external display. Here's my situation: I have an external monitor hooked up to to the MacBook's display port, I walk away from my computer for a few minutes and it goes to sleep. ( Update: Now running macOS Mojave 10.14.5 on a 13-inch 2018 model, and this is still a very annoying issue). ![]() I have a MacBook Pro (Retina, 13-inch, Early 2015, macOS High Sierra 10.13.6) which fails to detect an external display after is has woken up from sleep.
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