Apple - How do I get technical information on my video card? (Model, RAM, Mhz, etc)

Select Graphics/Displays from the output of system_profiler.

In a mac terminal, type:

system_profiler SPDisplaysDataType

The output will show something like this with your card name and details:

system_profiler SPDisplaysDataType

Graphics/Displays:

AMD FirePro D500:

  Chipset Model: AMD FirePro D500
  Type: GPU
  Bus: PCIe
  Slot: Slot-2
  PCIe Lane Width: x16
  VRAM (Total): 3072 MB
  Vendor: ATI (0x1002)
  Device ID: 0x679e
  Revision ID: 0x0000
  ROM Revision: 113-C3861J-687
  gMux Version: 4.0.11 [3.2.8]
  EFI Driver Version: 01.00.687
  Displays:
    CS230:
      Resolution: 1920 x 1080
      Pixel Depth: 32-Bit Color (ARGB8888)
      Display Serial Number: 27673034
      Main Display: Yes
      Mirror: Off
      Online: Yes
      Rotation: Supported
    CS230:
      Resolution: 1920 x 1080 @ 60Hz (1080p)
      Pixel Depth: 32-Bit Color (ARGB8888)
      Display Serial Number: 27712034
      Mirror: Off
      Online: Yes
      Rotation: Supported
      Television: Yes

AMD FirePro D500:

Click on the Apple icon in the upper left hand corner of your menu bar and select About This Mac from the menu.

In the dialog that appears click on the More Info... button to bring up the detailed about dialog.

Click on the System Report... button and you'll get a split-window dialog that has hardware components down the left side and details on the right.

Click on Graphics/Displays on the left. Pick a graphics card from the right side and you'll see all the details the system provides about it.

You can also get to the System Report by running Applications -> Utilities -> System Information.