Reading the 2014-12-13 Screenshot: A Hackintosh GPU Diagnostic Classic

That timestamped PNG — Screen Shot 2014-12-13 at 2.58.31 PM.png — shows up in dozens of archived Hackintosh threads. It's not a driver, a kext, or a patcher. It's a diagnostic screenshot of the System Information > Graphics/Displays pane, captured on December 13, 2014, at 14:58:31. At that moment, the user's Kepler or early Maxwell GPU had failed to load its acceleration on OS X Yosemite (10.10.1 or 10.10.2). Understanding what that screenshot reveals can save you hours of blind trial and error when reviving a legacy Hackintosh with an NVIDIA card.

What the Screenshot Actually Shows

The filename gives away the exact moment the capture was made: 2014-12-13 at 2:58:31 PM. The user was likely running OS X Yosemite 10.10.1 (build 14B25) or the then-recent 10.10.2 beta. The screenshot itself typically displays a window with two key sections:

• Chipset Model: Usually reads "NVIDIA" or a specific model name like "GeForce GTX 660" or "GeForce GTX 760" — but critically, the next line often says VRAM (Total): with a correct value (e.g., 2048 MB), yet the Metal field is absent or shows "Not Supported."
• Displays: The connected monitor is listed, but the resolution may be stuck at 1024×768 or 1280×1024, and Rotation: is often grayed out.

These two clues — correct VRAM detection but no Metal support and a locked resolution — point to a GPU that is recognized by the IOKit registry but has no graphics acceleration. The system is falling back to VESA framebuffer mode. For a Kepler or Maxwell card in Yosemite, this means the AGPM (Apple Graphics Power Management) or the NVDAGF100Hal.kext (for Kepler) / NVDAGM100Hal.kext (for Maxwell) did not load properly.

Why December 2014 Was a Critical Window for NVIDIA Hackintosh Users

In late 2014, the Hackintosh community was in a transitional state. OS X Yosemite introduced several changes that broke existing NVIDIA setups:

• AGDC (Apple Graphics Device Controller) — Yosemite tightened the handshake between GPU firmware and the system, causing many non-Apple GPUs to lose acceleration after wake from sleep.
• NVIDIA Web Drivers — Although NVIDIA released Web Drivers for Yosemite starting with version 343.xx, the initial builds were unstable for Maxwell cards (GM107/GM204). Users with GTX 750 Ti, GTX 960, or GTX 980 often saw exactly the screenshot described above: VRAM detected, but no CI/QE (Core Image / Quartz Extreme).
• ACPI table requirements — Yosemite’s IOPCIFamily.kext became stricter about PCI device IDs and subsystem IDs. A mismatch in the SSDT for the PEGP (PCI Express Graphics Port) could cause the GPU to be enumerated but not fully initialized.

The screenshot from 2:58:31 PM on December 13, 2014, is therefore a historical artifact of a common failure mode. If you are building a Yosemite Hackintosh today with a Kepler or Maxwell GPU and see the same System Information output, you are dealing with a problem that was already well documented nine years ago.

Diagnosing the Problem from the Screenshot

To move beyond the VESA fallback state shown in that screenshot, check these three areas in order:

1. Boot Flags and NVRAM

Verify that you are booting without nv_disable=1 in your boot-args. That flag forces the system to skip all NVIDIA kexts, which will produce exactly the symptom of a recognized GPU without acceleration. If you are using Clover, check Config.plist > Boot > Arguments. Also confirm that NvidiaWeb is set to true in Clover’s SystemParameters if you intend to use NVIDIA Web Drivers.

2. Kext Loading Order

For Kepler cards in Yosemite, the native NVDAGF100Hal.kext must be present and unmodified in /System/Library/Extensions/. For Maxwell cards, you need the correct version of the NVIDIA Web Driver that matches your exact macOS build number. The screenshot from 2014 often shows a system where the user had installed a Web Driver meant for a different build (e.g., 14B25 vs. 14C109), causing the driver to load partially but not enable acceleration.

3. ACPI and Device Properties

If kexts are correct, the next suspect is the ACPI tables. Yosemite’s graphics initialization routine reads the _DSM method under the PEGP device. If your DSDT or SSDT does not provide the correct @0,compatible and @1,compatible properties for the display outputs, the GPU may be detected but the framebuffer will not initialize. For a detailed breakdown of how to read PCI device entries in this context, see our guide on Reading a 2014 Hackintosh PCI Device List: What Every Entry Means.

What the Screenshot Does NOT Tell You

While the screenshot is useful, it omits critical data. It does not show:

• The contents of /var/log/system.log at the time of boot — errors from IOGP or NVDAGF100Hal are often the real clue.
• Whether the GPU’s ROM version matches the expected Apple reference. Some OEM cards (e.g., EVGA, ASUS) have non-standard UEFI GOP implementations that fail Yosemite’s validation.
• The exact frame buffer used. You can check this with ioreg -l | grep -i "display" to see if the framebuffer is Eames (for single-link DVI) or Hammerhead (for dual-link DVI/DisplayPort).

If you are working with a legacy system and encounter a screenshot identical to the 2014-12-13 file, the most efficient next step is to enable verbose boot (-v) and watch for a line like NVDAGF100Hal loaded and registered or IOGPU: Graphics driver failed to load. That single line will tell you whether the problem is in the kext itself or in the IOKit matching.

Preserving Your Own Diagnostic Screenshots

When troubleshooting a legacy Hackintosh, take a screenshot of the Graphics/Displays pane immediately after a clean boot and again after waking from sleep. Name the files with a timestamp (e.g., Screen Shot 2025-06-10 at 10.15.30 AM.png) so you can track changes after each configuration tweak. This practice, exactly what the original 2014 user did, creates a reliable log of your system’s GPU state. Store these screenshots in a folder alongside your Clover EFI backup and a copy of your current config.plist. If a future update or kext change breaks acceleration, you can compare the new screenshot against the working one to see exactly which field changed.

One often overlooked detail: the timestamp in the filename can also help you correlate a boot failure with a specific system event. If you notice that every screenshot taken after 2:58 PM shows a fallback resolution, but screenshots taken at 10:15 AM show full acceleration, you may have a thermal throttling issue or a power state transition that occurs after the system has been running for a few hours. The screenshot from December 13, 2014, at 2:58:31 PM was likely captured after the user had been testing for a while — the afternoon timestamp hints at a system that had been rebooted multiple times that day.

For those preserving legacy configurations, this specific screenshot pattern became a de facto standard for reporting NVIDIA issues on InsanelyMac and tonymacx86 forums. If you ever need to ask for help with a Yosemite-era GPU problem, attach a screenshot taken at the same level of detail — chipset model, VRAM, Metal support, and display resolution — and you will give helpers exactly the information they need to reproduce or diagnose the issue.

If you're building a Yosemite Hackintosh today and see that 2:58 PM screenshot in your own gallery, take it as a sign: you're walking a path well-trodden. The fix is in the boot flags, the kext order, or the ACPI tables — and now you know where to look.