The animations appear black, even though they move fine. So far, I have only seen one other user report this, but it was in the thread concerning the Mac lagging issue, and I did not see any developer address it. Currently, I'm having no lagging issues, and I'm not having any other graphics issues. Music and volume are fine. No crashes. The screen does not flicker. (If this issue has been addressed in another thread, forgive me. I looked diligently before posting--I swear!)

I have changed the refresh rate in the settings text file to 60 as suggested in the Known Issues thread, but that did not change anything. I have also changed the screen resolution several times. Lastly, I have turned off all the graphics in the Options menu except for borders and rivers.
Below are the specs on my Mac:
Processor Information:
Model: iMac9,1
Vendor: GenuineIntel
Speed: 2930 Mhz
2 logical processors
2 physical processors
HyperThreading: Unsupported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Unsupported
Network Information:
Network Speed:
Operating System Version:
MacOS 10.6.8 (64 bit)
Video Card:
Driver: NVIDIA GeForce GT 130
Driver Version: 1.2
Driver Date: 0 0
Desktop Color Depth: 32 bits per pixel
Monitor Refresh Rate: 0 Hz
VendorID: 0x10de
DeviceID: 0x62e
Number of Monitors: 1
Number of Logical Video Cards: 1
Primary Display Resolution: 1920 x 1200
Desktop Resolution: 1920 x 1200
Primary Display Size: 20.47" x 12.60" (24.02" diag)
52.0cm x 32.0cm (61.0cm diag)
Primary VRAM: 512 MB
Memory:
RAM: 4096 Mb
I have changed the refresh rate in the settings text file to 60 as suggested in the Known Issues thread, but that did not change anything. I have also changed the screen resolution several times. Lastly, I have turned off all the graphics in the Options menu except for borders and rivers.
Below are the specs on my Mac:
Processor Information:
Model: iMac9,1
Vendor: GenuineIntel
Speed: 2930 Mhz
2 logical processors
2 physical processors
HyperThreading: Unsupported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Unsupported
Network Information:
Network Speed:
Operating System Version:
MacOS 10.6.8 (64 bit)
Video Card:
Driver: NVIDIA GeForce GT 130
Driver Version: 1.2
Driver Date: 0 0
Desktop Color Depth: 32 bits per pixel
Monitor Refresh Rate: 0 Hz
VendorID: 0x10de
DeviceID: 0x62e
Number of Monitors: 1
Number of Logical Video Cards: 1
Primary Display Resolution: 1920 x 1200
Desktop Resolution: 1920 x 1200
Primary Display Size: 20.47" x 12.60" (24.02" diag)
52.0cm x 32.0cm (61.0cm diag)
Primary VRAM: 512 MB
Memory:
RAM: 4096 Mb