Found it!. Thank you. Installed 3.5.5, but it would not start. Deleted the data files from Application Support/Kstars. Then it did work, so I have now a working 3.5.5 next to 3.5.7beta. However... the indi_qhy_ccd driver still crashes. So it looks like somewhere along the line I'm doing something wrong. But where....? Would love to hear any ideas from anyone.