Please take a look at this issue: https://www.forum.puppylinux.com/viewtopic.php?t=4061 which describes the disappearing message window problem. When this occurs I set message window visible and then fish around at the edge until I find the pane and drag it back to normal. But when this happens to my mentees they find it very difficult to do this as they are beginners and so they form a negative image of Geany as difficult to use. Please could you make it much easier to recover the message window when it has been inadvertently dragged too far to the right to be visible by a beginner?
Not Mac specific, the problem is that the default GTK theme makes the size of window pane handles extremely small, especially on high resolution screens. It would be a good exercise for your mentees to Google which GTK CSS setting controls that and set it in Geany.css.
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