Second Display Mirroring

[Bocajalistick]

On macOS Sierra I have two monitors plugged in and both show the exact same image. This even happens in the BIOS screen and in the Clover Bootloader screen. One monitor is using HDMI and the other is using display port, both plugged into my graphics card (R9 290). I hope to fix this and have both screens independent of each other acting as an extended desktop.

I must add that on windows this setup works fine.

Thanks for all the help in advance

 

[slim.jim]

On macOS Sierra I have two monitors plugged in and both show the exact same image. This even happens in the BIOS screen and in the Clover Bootloader screen. One monitor is using HDMI and the other is using display port, both plugged into my graphics card (R9 290). I hope to fix this and have both screens independent of each other acting as an extended desktop.

I must add that on windows this setup works fine.

Thanks for all the help in advance

Did you uncheck mirroring in Display Preferences?

 

[Pavo]

This happens when you are not on a GOP rom also

 

[Fl0r!an]

Does your R9 290 have full acceleration? It's not OOB, so will only run on native drivers with some tweaks. The basic software rendering is limited to a single screen.