ASUS PG278Q Display

This new display seems to not be supported within Mavericks OSX 10.9.4. I get a black screen, and the monitor registers no signal. I'm connecting it over Displayport on a GTX 680 graphics cards.
In Windows 8.1, it works great with the latest drivers (but only displays after it's booted). During boot, there is no BIOS screen visible on the monitor.
Has anyone had any experience with this monitor on MacOS?

Replying to myself here after spending several days trying to get this display to work with my Hackintosh.
First, I've confirmed that it works with MacOS 10.9.4 because it immediately connected to my Retina MacBook Pro using a Mini-Displayport to Displayport cable that was Apple certified for 2560x1440. Therefore, I have concluded that it is not a driver issue.

However, no matter what I try, it does NOT work with the Hackintosh connected over a Displayport cable. In SMBIOS, the monitor is recognized when set to MacPro 5,1 / MacPro 6,1 / iMac12,2 and iMac 14,2. Connected to a second monitor over HDMI, I can confirm that the monitor is discovered, displaying the correct display name but still no picture. The native resolution was not one of the selectable resolutions, so I configured it to 2560x1440 at 60Hz with SwitchResX. Still, I get nothing but a black screen.

Does anyone have any other suggestions? If a real Macintosh computer can work, shouldn't I be able to get it to work with my Hackintosh? Is there something peculiar about the difference between Displayport and Mini-Displayport that might be the problem? I think I've probably tinkered with the settings in Clover and rebooted over 100 times now...

2560x1440 resolution requires dual-link connection

do you have another graphics card to try, maybe the framebuffer setting is incorrect

I can use GT640 with Dell Ultrasharp U2713H with 2560x1440 resolution

Thanks for your suggestion. I'm starting to think I may need to buy a new graphics card. Not only to get the monitor to work in OS X, but because the larger screen size feels like it requires something more robust. I'd hate to be in the same situation again though with another card. Is there something I should particularly look for in buying a new card? Are there any cards, among those in the buyer's guide, that are especially compatible with high resolution displays?

I solved the problem with this monitor by reinstalling Mavericks.

The NVIDIA drivers built into 10.9.0 recognized the monitor. During the installation using Chimera, it would have trouble booting the installer with the Displayport plugged into the graphics card. I booted Chimera off USB and monitored the installation off a separate display connected to the HDMI port of the internal graphics on the motherboard. If you wait until after you've entered the installer (right before it starts writing the install to disk) to connect the Displayport cable, you should be able to boot the USB installer without it freezing. With the Displayport cable attached to the PG278Q during the installation process, it lights up as a second display during the installation process. Rebooting after installation (again with Chimera), will bring you to the startup screen with no problems. My SMBios was set to MacPro5,1 throughout.

Once up and running, any updates to the OS from 10.9.0 would kill the connection to the display. Presumably, this is because the newer NVIDIA drivers are less compatible. Many have reported various problems with the newer drivers, particularly from 10.9.3. I had no luck even with 10.9.2. The web drivers were not helpful either. In the end, I updated to 10.9.4 (using the second monitor, HDMI connection to the motherboard, and InjectIntel (in Clover) or enabling GraphicsEnabler=1 (in Chimera); and then needed to install (using Kext Utility) the old NVIDIA drivers from 10.9.0 to get it to work again. I have attached the NVIDIA drivers from 10.9.0 here that worked for me. When rebooting 10.9.4 with the correct (old) drivers installed, you do not need NVIDIAInject (Clover) or GraphicsEnabler (Chimera), and you certainly do not want the web drivers argument (do not use nvda_drv=1). If you are having trouble with Displayport, then I recommend using these drivers and avoiding newer ones or the NVIDIA web drivers.

Displayport (as opposed to HDMI) is one of the least compatible display connections for Hackintosh. Recent NVIDIA drivers in Mavericks (10.9.2~) and web drivers are even less compatible. My life lesson for today is that newer is not better (when it comes to NVIDIA drivers for MacOS).

View attachment Kexts.zip

Hey Hooner,

I'm strongly considering buying this monitor. There's nothing else like it on the market. Other than the driver difficulties, what are your impressions of this monitor on OS X? Have you been able to drive it at the full 144Hz? Any other suggestions for getting it working out of the box?

My setup is very similar to yours. I have a Gigabyte Z77X-UD5H motherboard with twin GTX 670s (SLI'd on Windows, use only one on OS X), and an i5-3570K . I mainly use Windows, but I want to make sure I can get the PG278Q working on OS X before I buy it. What do you think, is it worth the $800 bucks?

I have been able to run the monitor at 120Hz in MacOS, but I've not tried it running it 144Hz. It does not show an option for this in the Display settings, so I would probably need to configure one in SwitchResX. I really don't game in MacOS; I just use it for work. When I want to game, I boot into Windows. I suspect that MacOS is not going to support G-Sync for a long time. Otherwise, the monitor looks great in MacOS. I have an Apple Cinema Display at the office, and frankly for work I think the Apple Cinema Display is sharper and easier on the eyes. The PG278Q is too bright, whereas the Cinema Display easily allows you to adjust the brightness from the keyboard.

The fact that the current MacOS (10.9.4) and webdrivers from NVIDIA don't support the monitor (but the older ones do!) makes running this display with MacOS something of a pain. I worry that any future system update will break the drivers again. I even tested with the Yosemite public beta, and it did not work. I recommend having a system with two working hard drives so that you can first test any future updates.

My biggest complaint about the monitor is the single Displayport connector. I really wish it had a HDMI port (even if it didn't support G-Sync). There might be better (and cheaper) options in the future. If you can wait, I would not particularly recommend buying this monitor now.

Thanks for your reply. I've held off on buying it for now. But I did want to know if you had tried out the 10.9.5 update, or the latest NVIDIA web drivers, and if either one had made a difference.

I updated to 10.9.5, and the monitor is displaying without problem! I was prepared for the worst, and installed the old Nvidia graphics kexts in Clover's 10.9 kexts folder just in case the update didn't work. I didn't need to issue the the boot command to forcible inject the kexts, so I'm concluding that 10.9.5 Nvidia graphics drivers are good. Since the default drivers are working, I didn't bother to test the new Nvidia web drivers.

Hey that's awesome news! I think that means I have no excuse not to buy it now (other than, ya know, not really needing it). Thanks for the update.