Terraria Graphics Glitch

[ThePowerofNull]

I have been playing terraria on mac for a while now, but after a while when playing, the graphics in game begin to freak out, causing multiple areas of the screen to switch with other areas. This always happens after a random amount of time, but it happens between 30 minutes and 2 hours of playing. Is this my computer having problems?

Computer Specs:
Mac mini (Mid 2010)
Processor 2.4 GHz Intel Core 2 Duo
Memory 8 GB 1067 MHz DDR3
Graphics NVIDIA GeForce 320M 256 MB
OS X El Capitan, Version 10.11.6

Game video settings:
Resolution: 1920x964
Parallax: 60
Frame Skip: On
Lighting: Retro
Multicore Lighting: off
Quality: Low
Background: On
Blood and Gore: On
Miner's Wobble: Enabled
Storm effects: disabled
Heat Distortion: disabled
Waves Quality: High

Screenshot: http://steamcommunity.com/sharedfiles/filedetails/?id=938311061
If you look closely at the screenshot, you can see slight errors in the textures. These flash on and off the screen when this happens. I always fix it by relaunching terraria, but they still come back.

DO NOT ASK ME TO REINSTALL THE GAME OR REBOOT MY COMPUTER. I have done this too many times to remember.

[AblazingGrace]

I can't tell much from your screenshot, but I'd double check your quality is actually on low and not auto. All the same, it may be a good idea to verify your cache quickly; you don't need to reinstall to do that.

[ThePowerofNull]

I am for sure that the graphics are not on auto. I have also verified the cache, and there seems to be no problems. Oh and if you look at the trash can you can see the graphical glitch really well

[ThePowerofNull]

Here is another screenshot:
http://steamcommunity.com/sharedfiles/filedetails/?id=938362245
If you click the image and pan around, you will notice many errors in the textures. This is the glitch I am talking about.

[AblazingGrace]

Oh gross, not what I was thinking about at all. I have no idea what would cause this, aside from corrupted files or graphics card issues, or possibly a mod but I doubt that.

[Snek]

I'd highly recommend posting this error here.[forums.terraria.org] It's much more likely to be reported and/or fixed there, given there are many more people looking there.

[Scape]

how to fix the random texture glitch?