I have Geany 1.33 on two iMacs, It works fine on the iMac16,2 which reports as iMac (Retina 4K, 21.5-inch, Late 2015) It shows the same faulty behaviour on the iMac14,1 which reports as iMac (21.5-inch, Late 2013) Both iMacs have macOS High Sierra 10.13.6