1. Mac Displayport Not Working After Manual Shutdown Windows 10
2. Restart And Shutdown Not Working
3. Shutdown Button Not Working
4. Mac Displayport Not Working After Manual Shutdown Windows 7

Apple's Mini DisplayPort adapters work with Mac models that have a Mini DisplayPort, Thunderbolt port, or Thunderbolt 2 port when using Mac OS X Leopard 10.5.6 or later: These adapters don't work with the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter, which doesn't support Mini DisplayPort displays. Oct 30, 2013  Resolved DisplayPort to DVI not working. Discussion in 'Mac mini' started by photogineer, Oct 30, 2013. It has multiple reviews of working with the Mac Mini, so I thought it would be ok, it's 1/3 the price of the Apple one and Prime eligible. And I've been pretty happy with it. I ordered a Mini DisplayPort to DVI adapter on Amazon,.

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.

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.

Any help would be appreciated

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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I have installed Mojave on the following. Shutdown and DisplayPort signal from the video card (hdmi is fine) are not working.
Mobo: Gigabyt z390 Aorus Pro Wifi (f6 bios)
CPU: i9 9900k

Mac Displayport Not Working After Manual Shutdown Windows 10

Ram: 32 gb 2400 Crucial 16x2
GPU: MSI rx 580
Checked the Bios settings:
MIT> Adv Mem Settings > XMP > Profile 1
BIOS > CSM Support > Enabled
Peripherals > USB Config > Legacy USB Support > Enabled
Peripherals > USB Config > XHCI Handoff > Enabled
Chipset > VT-d > Disabled
Chipset > Internal gpu > Auto
Chipset > Wake on LAN Enable > Disabled
Power > ERP > Enabled
I used Unibeast (which used Clover 4862 boot loader). It was necessary to alter the config.plist that Unibeast created in order to install. Based on others’ posts, and a lot of trial and error, I eventually succeeded with the following changes:
boot arguments
dart=0
nv_disable=1
darkwake=0
-lilubetaall
Rt Variables
CsrActiveConfig = 0x67
SMBIOS
Product name = iMac18,3

Restart And Shutdown Not Working

Files in efi/clover/drivers64UEFI
apfsDriverLoader-64
AptioMemoryFix-64
AudioDxe-64
DataHubDxe-64
FSInject-64
PartitionDxe-64
SMCHelper-64
VBoxHfs-64
files in efi/clover/kexts/other
FakeSMC
IntelMausiEthernet
Lilu
USBInjectAll
WhateverGreen
After logging into Mojave, I ran Multibeast.
Quick start > Clover UEFI Boot mode
Drivers > Audio > 100/200/300 Series Audio Support (HDAS-> HDEF)
Drivers > Misc >FakeSMC
Drivers > Misc >FakeSMC Plugins
Drivers > Misc >FakeSMC HWMonitor Application
Drivers > Network > Intel > IntelMausiEthernet v2.4.0
Drivers > USB >USBInjectAll
Bootloaders > Clover UEFI Boot Mode
Customize > System Definitions > iMac > iMac 18,3
Customize > Graphics > Core Graphics Fixup AKA WhateverGreen

Shutdown Button Not Working

Unfortunately, it becomes difficult to understand the effect of every little change with so many variables. At this point, I noticed that booting from the hard drive, the clover Bootloader was older (47__) than with the USB. Also, the Boot arguments were not the same as what I used on the USB drive. I believe the only thing listed was dart=0. But, it mostly worked.
First, I tried to get the DisplayPort cable to work from the gpu without success. In attempting to fix this, I installed newer versions of whatevergreen.kext and Lilu.kext using Kextbeast. Older versions were installed by Multibeast. No success.
Second, I tried to fix Shutdown, so I proceeded to try numerous changes. From my recollection, simply selecting Fixshutdown and Halt Enabler in Clover (on either the hard drive or USB) did not solve the problem.
In addition, I did the following according to : https://www.tonymacx86.com/threads/solved-shutdown-reboot.267582/

1. enabled slide=0 field (boot) in Clover Configurator
2. removed AptioMemoryFix-64.efi from /EFI/CLOVER/drivers64UEFI folder
3. added EmuVariableUefi-64.efi and OsxAptioFix2Drv-free2000.efi into /EFI/CLOVER/drivers64UEFI folder
4. restart system

Now that I am writing this, I wonder if I should have unselected fixshutdown and haltenabler after these changes? Nonetheless, booting from USB worked! I was optimistic.
However, i could not boot from the hard drive. I think I was getting the stop sign error. So, I added the same boot arguments that were on the USB. This caused the system to proceed through the boot very very slowly, and even then, the system typically halted or crashed. I was only able to get into Mojave a couple times, but then the system would always freeze and I would have to do a hard restart.
I noticed Multibeast has an option which also included using emuvariableuefi-64 and osxaptiofix2drv, so I tried that (grabbing at straws at this point).
Quick start > Clover UEFI Boot + emulated NVRAM
I had identical results as to when I had altered the hard drive Config.plist.
I have tried so many things, and I am confused, getting nowhere, so I reinstalled Mojave out of concern I had altered the install too much.
I have not run Multibeast as of yet. I don’t want to compound problems.

1. Shall I run Multibeast? IF so, what settings?
2. Perhaps I should copy my USB EFI folder to the hard drive and bypass Multibeast?
3. I don’t understand why the hard drive boot does not work while the USB does, when using identical settings.

Mac Displayport Not Working After Manual Shutdown Windows 7

I am looking for guidance. Thank you.