I month ago I got an old MacBookPro 8,1 (2012) and it’s pre-retina so resolution is max 1280x800. Out of the box everything was a bit too big and I reduced dpi but then some qt-apps don’t show properly. I looked in qt5-config-tool but there I get the message that “The QT_QPA_PLATFORMTHEME environment variable is not set (required value: qt5ct).” I have exported this in terminal but It made no difference. The only small temporary fix I have found is to open qt-app in terminal with
Anyone who knows a more permanent fix?