Every time I update I have to mess around with the screen resolution settings to recreate what I had before. I have an iMac (Retina 5K, 27-inch, 2017) with a Dell P2715Q (5K) monitor which I use for my Parallels Windows 10 setup.
Sometimes it just accepts the old settings I specify the first time and away we go. Other times it's a rigmarole of settings change, reboot to save, settings change to something random, reboot, specify again, reboot, wait, wait and whew, this seems to have stuck.
Sometimes it just accepts the old settings I specify the first time and away we go. Other times it's a rigmarole of settings change, reboot to save, settings change to something random, reboot, specify again, reboot, wait, wait and whew, this seems to have stuck.