Some days ago I installed Ubuntu 16.04 in dual boot with mac OS and it works very well (although the battery life is very poor).
I saw that the default graphic card is nvidia (NVIDIA GeForce GT 650M).
When I try to switch from nvidia to intel, Ubuntu boots in low-graphics mode.
The current Nvidia driver is 370 open source, but also it gives me a problem when i try to enter in terminal mode, the screen becomes black.
I have to switch the graphics card because I must work with Linux.
Nvidia:
Chipset Model: NVIDIA GeForce GT 650M
Type: GPU
Bus: PCIe
PCIe Lane Width: x8
VRAM (Total): 1024 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0fd5
Revision ID: 0x00a2
ROM Revision: 3682
Automatic Graphics Switching: Supported
gMux Version: 1.9.23
Intel:
Chipset Model: Intel HD Graphics 4000
Type: GPU
Bus: Built-In
VRAM (Dynamic, Max): 1536 MB
Vendor: Intel (0x8086)
Device ID: 0x0166
Revision ID: 0x0009
Automatic Graphics Switching: Supported
gMux Version: 1.9.23
MacBookPro 15" mid 2012