Excuse me? First off, maximum supported VRAM on MacBooks Intel HD 4000 is 768MB. Second, even if you can get 1,692MB. Does it do any good?Can you back up your claims with anything beside your ignorance?
In Windows HD 4000 can dynamically allocate up to 1692MB of VRAM and that is not me saying that but Intel.
Now if you and the "above poster" do not find any use for it, why even bother responding to this thread? Or if you think that VRAM is that useless for what you use your Mac, then you can reduce it to 256MB and have more RAM available, I really dont understand people that just see 1GB...
garciausmc found a good use for the big amounts of VRAM and I agree that most of the time even 512MB of VRAM is useless, but if in future OSX or apps will use OpenCL more heavily that might change.
1 VRAM ≠ Performance.
2 Why allocate that much RAM reserved for GPU when you don't need it?
3 Theres a reason why Apple set the amount of RAM available.