Discrete Graphics not Activating I have an issue getting the discrete graphics card to activate. The About This Mac screen shows only the Intel Iris Pro active.

I've checked that Automated Graphics Switching is enabled in the Energy Saver system preferences. gfxCardStatus shows Intel as active even when I select the Discrete Only option.

I've tried closing any open applications in case something was using the graphics but I'm still unable to activate the discrete graphics.

Does anyone know if there's a command I can run to check if a process might currently be using the integrated graphics? Is there any other way I can try to get the discrete graphics enabled?

Thanks in advance!

Macbook Pro 11,3 MacOS 10.10.5
To know exactly what process is using the discrete card, look at the activity monitor energy tab "Requires High Perf GPU" column https://support.apple.com/en-gb/HT202053

To check what display devices are on your system entering the following in the terminal should work

system_profiler SPDisplaysDataType


As mentioned in a similar question https://apple.stackexchange.com/a/74881/39577