Hello, since this thread is long and very often it's not sure if the problems are with 10.12 and 10.13, and if they are only there with Nvidia cards, i wanted to ask if it's safe to make the security update in my constellation.
(10.13.4, and a Radeon 580 video card?
Ok, i have some new insights.
First, i realized that inject intel was on in the graphic settings.
Disabling this solved a problem with Safari (some icons weren't shown correctly).
However, this didn't change the situation with the monitors.
With experimentation i came to the following...
Hello,
had my build (that i didn't set up myself) running with Yosemite and 3 monitors.
Made a fresh install of Sierra 10:12.6 on a new drive (from a USB stick with unibeast/Sierra; and Multibeast as post installation).
In Sierra, i can only use 2 monitors, with different working combinations...
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