I'm sure this has been asked before although in all the discussions I've seen their VRAM has been fine although my only problem it seems is not having enough VRAM. How do I fix this? I'm not sure where exactly to start or what this even means. On macOS Catalina iMac (21.5-inch, Late 2013). Thanks in advance!
It's simply an old Mac and it very much means what it says. Your GPU does not have enough graphics memory to support certain functions. This is nothing you can change, it's a hardware thing. The basics will and should work, though. You just may have to go without soem fancy filters and AI-based functions.