Disable the intel HD4000 IGP on Mac ?
The IGP on Mac uses 1536MB, it could perhaps be interesting to deactivate it on Macs limited in RAM maximum 16GB on Mac mini 2012 for example and using an eGPU.
There was an order to increase the amount of VRAM with the terminal. but I don't know of any command to disable IGP? I would be interested to know if this exists and if it does not cause a malfunction.