It was a USB-C to DisplayPort adapter, after which I used a DisplayPort cable to connect it to my external UHD monitor (Philips Brilliance 288P). The MacBook Pro was running Sierra as operating system, and it recognized the external monitor. After I went through a bit of technical problems, however.
Hello,
A bit ago I purchased myself a MacBook Pro 15' (2016).
I purchased an adapter so I could connect it to my external monitor (which functions perfectly). It was a USB-C to DisplayPort adapter, after which I used a DisplayPort cable to connect it to my external UHD monitor (Philips Brilliance 288P).
The MacBook Pro was running Sierra as operating system, and it recognized the external monitor.
After I went through a bit of technical problems, however. Eventually, my 2016 model got replaced by a brand-new 2017 model. This one shipped with High Sierra, and is now running version 10.13.
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).
The external monitor does not show up in the 'display' section, and when connected and turned on simply goes to sleep. Normally it automatically detects a source and switches to that mode, but I also tried manually switching to DisplayPort as an input, after which I immediately receive the message of no signal being found.
I know for sure that the adapter works properly, as I have two of them which both worked before. Little tricks such as trying all USB-C ports, rebooting and reconnecting everything and booting in safe mode are to no use. Since using this new MacBook Pro with High Sierra on it, it simply acts as if my external monitor does not exist.
Does someone have any clue on what to do?
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Owners manual for mac os high sierra version 10.13.2 10 13 2. MacBook Pro with Retina display, macOS High Sierra (10.13)
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I am currently using a MacMini (Late 2014) with a BenQ BL2420PT Monitor. I connect them over a Thunderbolt(the old mini-DisplayPort) to DisplayPort cable.
Mac Displayport Not Working After Manual Shutdown On Mac
Both Mac and monitor are 6 Months old and I have used them almost every day. But a week ago the monitor didn't show the Apple logo during boot and this morning the monitor just said 'no signal detected' for about half an hour.
I already tried booting into safe mode and into recovery mode, but there is nothing showing up.
Mac and monitor are still working because I am able to connect to the Mac via SSH and connecting the monitor to my Windows laptop (VGA to VGA) still works.
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Any help would be appreciated
Mac Displayport Not Working After Manual Shutdown 2017
DeveloperTKDeveloperTK
1 Answer
I have the same problem with Late 2012 -- by unknown reason the monitor says 'no cable connected' and cannot turn on.The only solution I found is turn off the monitor via black toggle switch (not a sensor button on front panel) and wait some time.
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Николай ЛавровНиколай Лавров
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