Shiny Textures Bug

Hi, I’ve been having a bit of a graphics problem, that no matter what I try to do, does not fix. No matter the graphics setting, it keeps popping up, and it is bothering me.
Here’s the problem:

And here are my basic system specs:
I can supply other system specs if needed.
Possibly helpful notes:
Map is rp_industrial17_v1
I’m on a server that usually has between 40-50 players online
The gamemode is CW:HL2RP
This has also happened on other maps, such as rp_c18_v1 and rp_city45_2013
Help would be much appreciated!

It’s a known issue with OS X and no fix is known. :frowning: