cMP: getting Dell 5K working in Sierra?

HHarm

macrumors regular
Original poster
Mar 4, 2009
138
2
My Dell 5K stopped working in El Capitan. Probably could have gotten it working but ended up upgrading to Sierra. Now I'm lost.

I can't launch into 5K by turning the monitor off and back on after starting my Mac. The display stays in the faux two monitor setup.

I have OSX 10.12.2, 980ti, Dell UP2715K and the latest web drivers (25f02).

nvram -p reports:
Code:
bluetoothInternalControllerInfo    %15%82%ac%05%00%00%11Z%00#%12I%f4%bc
prev-lang:kbd    fi:17
fmm-computer-name    HHarm - Mac Pro
efi-boot-device    <array><dict><key>IOMatch</key><dict><key>IOProviderClass</key><string>IOMedia</string><key>IOPropertyMatch</key><dict><key>UUID</key><string>4A371805-2014-4A22-8A83-8198D9ECB6E5</string></dict></dict><key>BLLastBSDName</key><string>disk1s3</string></dict></array>%00
bluetoothActiveControllerInfo    %15%82%ac%05%00%00%00%00%11Z%00#%12I%f4%bc
SystemAudioVolumeDB    %fa
SystemAudioVolume    :
efi-boot-device-data    %02%01%0c%00%d0A%03%0a%00%00%00%00%01%01%06%00%00%07%01%01%06%00%00%00%01%01%06%00%00%05%01%01%06%00%00%00%03%12%0a%00%00%00%00%00%00%00%04%01*%00%03%00%00%00%882%cb%1d%00%00%00%00%00%00%04%00%00%00%00%00%05%187J%14 "J%8a%83%81%98%d9%ec%b6%e5%02%02%7f%ff%04%00
nvda_drv    1
EFIBluetoothDelay    %b8%0b
sudo nvram boot-args="nvda_drv=1" gives an error message:
Code:
nvram: Error setting variable - 'boot-args': (iokit/common) general error
Any help is much appreciated!
 

Fl0r!an

macrumors 6502a
Aug 14, 2007
906
526
I think the NVRAM is protected by SIP, starting with El Capitan. Disabling it should allow adding the nv_spanmodepolicy arg.
 

HHarm

macrumors regular
Original poster
Mar 4, 2009
138
2
Thanks that helped. With no recovery partition I created a Sierra installer on USB and booting from that I turned off SIP.

Then I ran sudo nvram boot-args="kext-dev-mode=1 nv_spanmodepolicy=1" and 5K is again usable.

Moments like these make me long for a new Mac Pro that would "just work"!
[doublepost=1483994025][/doublepost]Beginner question...... but do I need to leave SIP off or can&should I turn it back on?
 

Redneck1089

macrumors 65816
Jan 18, 2004
1,164
273
Old thread, but I am also interested in whether I can turn SIP off and leave it for this and then turn it back on. Does anyone know?
 

Redneck1089

macrumors 65816
Jan 18, 2004
1,164
273
New problem:

I can't put my Mac Pro into recovery to disable SIP because of my unfleshed GTX 980 Ti.

Has anyone found a workaround to this, or found a way of doing it blind?
 

Synchro3

macrumors 68000
Jan 12, 2014
1,979
834
Afaik recovery mode needs an EFI graphics card. No network screen sharing possible, also using duet app with an iPad not possible.

Do you have another Mac where you could install the SSD/HDD, or in an USB case, and then turn off SIP?
 

Redneck1089

macrumors 65816
Jan 18, 2004
1,164
273
Afaik recovery mode needs an EFI graphics card. No network screen sharing possible, also using duet app with an iPad not possible.

Do you have another Mac where you could install the SSD/HDD, or in an USB case, and then turn off SIP?
I have a MacBook Pro and I can easily take the SSD out of the cMP.

However, isn’t recovery mode tied to the MacBook’s own internal ssd? I’m sitting at the recovery mode window but there’s no way of telling whether when I type in the command line to disable SIP that it will apply to the right drive.

I might be out of luck on this one :(
[doublepost=1505919906][/doublepost]
Yea... You really need to keep a Mac EFI card around for just such cases. Even a cheap GT-120 like most people use when using non-efi cards.

I can get one of those relatively inexpensively.

Just to confirm, that model still works in the 5,1 Mac Pro?

Thanks for your suggestion.
 

William Payne

macrumors 6502a
Jan 10, 2017
931
359
Wanganui, New Zealand.
I have a MacBook Pro and I can easily take the SSD out of the cMP.

However, isn’t recovery mode tied to the MacBook’s own internal ssd? I’m sitting at the recovery mode window but there’s no way of telling whether when I type in the command line to disable SIP that it will apply to the right drive.

I might be out of luck on this one :(
[doublepost=1505919906][/doublepost]


I can get one of those relatively inexpensively.

Just to confirm, that model still works in the 5,1 Mac Pro?

Thanks for your suggestion.
Yeah make sure it's a Mac one though. The gt120 was basically the low tier basic Mac Pro gpu.
 

h9826790

macrumors G5
Apr 3, 2014
14,108
6,732
Hong Kong
Afaik recovery mode needs an EFI graphics card. No network screen sharing possible, also using duet app with an iPad not possible.

Do you have another Mac where you could install the SSD/HDD, or in an USB case, and then turn off SIP?
Recovery partition don’t need EFI except Maxwell and Pascal card. For all other non EFI cards have native support, recovery partition will work without boot screen.

Therefore, for recovery partition only, any dirty cheap OOTB card can do the job, not necessary get a Mac card.

New problem:

I can't put my Mac Pro into recovery to disable SIP because of my unfleshed GTX 980 Ti.

Has anyone found a workaround to this, or found a way of doing it blind?
It is possible to disable SIP via Single-user Recovery Mode.

Reboot Mac holding down Command+R+S

Wait 3 minute to make sure the loading is completed (it should only need less than a minute, 3 min is super safe)

Then hit ENTER 10 times to make sure you get the command prompt

Then type
Code:
csrutil disable
Wait 10 seconds

type
Code:
reboot
 
Last edited:

Redneck1089

macrumors 65816
Jan 18, 2004
1,164
273
Recovery partition don’t need EFI except Maxwell and Pascal card. For all other non EFI cards have native support, recovery partition will work without boot screen.

Therefore, for recovery partition only, any dirty cheap OOTB card can do the job, not necessary get a Mac card.



It is possible to disable SIP via Single-user Recovery Mode.

Reboot Mac holding down Command+R+S

Wait 3 minute to make sure the loading is completed (it should only need less then a minute, 3 min is super safe)

Then hit ENTER 10 times to make sure you get the command prompt

Then type
Code:
csrutil disable
Wait 10 seconds

type
Code:
reboot

Thank you so much! This worked swimmingly!



My next question is:

Now that I have got 5K working on the cMP, it’s literally at 5K. System preferences says 1440p is available only on low resolution mode.

Is there away around that to get pixel doubling?
[doublepost=1505941960][/doublepost]NEVERMIND!

I figured it out. Had to press the option key and ‘scaled’ for more available resolutions.

Thanks again everyone for the help, especially h9826790!

I also bought a GT 120 off eBay for boot screen in the future.
 
  • Like
Reactions: h9826790

Dr. Stealth

macrumors 6502a
Sep 14, 2004
812
720
SoCal-Surf City USA
Glad you go it working ! I bought the same display and it was delivered an hour ago. I'll be setting it up today after work. I've been following all the threads on the Dell 5K UP2715K so hopefully I won't have to jump through too many hoops.
 

Redneck1089

macrumors 65816
Jan 18, 2004
1,164
273
Glad you go it working ! I bought the same display and it was delivered an hour ago. I'll be setting it up today after work. I've been following all the threads on the Dell 5K UP2715K so hopefully I won't have to jump through too many hoops.

I think everything instruction-wise is in this thread. It shouldn't be too much hassle now! Enjoy the monitor. I am really liking mine!
 

Redneck1089

macrumors 65816
Jan 18, 2004
1,164
273
Glad you go it working ! I bought the same display and it was delivered an hour ago. I'll be setting it up today after work. I've been following all the threads on the Dell 5K UP2715K so hopefully I won't have to jump through too many hoops.
One thing I have noticed is that I am having to power cycle the Dell if it goes to sleep from inactivity. Not a huge deal, but a bit annoying.

Let me know if you experience this too.
 

Squuiid

macrumors 68000
Oct 31, 2006
1,569
883
One thing I have noticed is that I am having to power cycle the Dell if it goes to sleep from inactivity. Not a huge deal, but a bit annoying.

Let me know if you experience this too.
This is a known bug I believe.

Has anyone tried this Dell monitor with an RX 580? If so, what is your experience with it?
 

Dr. Stealth

macrumors 6502a
Sep 14, 2004
812
720
SoCal-Surf City USA
My Dell 5k is all setup and working awesome on my cMP. Yes, I had the wake from sleep issue so I just disabled sleep for now. Other than that all is well.

Well.... Now that I've had a little time to tweak a few settings all is working very well in Sierra 10.12.6 and Windows 10 Pro. The more I use this display the more I like it. I really wasn't sure at first but now I see it's a very nice upgrade from my Apple Cinema Display. Everything is super crisp looking, text is VERY sharp and colors are very rich.

I now see that sleep works fine in Win 10 (display comes back on wake), It's only macOS that has the sleep issue. It's the only issue I see at this point.


Screen Shot 2017-09-22 at 9.02.37 AM.png
 
Last edited:

Redneck1089

macrumors 65816
Jan 18, 2004
1,164
273
Soa problem I have discovered is that my mouse cursor jumps around while using the Dell 5K. It is like the screen is split in two, and when I'm using things like brushes in Photoshop or Lightroom the mouse jumps when crossing the middle line of the screen.

Has anyone experienced this, and if so, does anyone know how to fix it?
 
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