After installing DK 6.3.0 on two macs, everything is a few times larger than it should be in digikam Image Editor and Light Table windows, and in showfoto, including the toolbar, thumbnails, content. Button and cursor activity doesn't match the location of where the pointer actually is. But the digikam main window and the batch queue manager window do not have this problem. One of the DK 6.3.0 installations was "fresh" over a new macOS install, the other was an upgrade from DK 6.0.0.
I think it might be related to Retina displays because the problem doesn't occur with 6.3.0 on two non-retina computers I tried (but they are also non-standard in other ways).
All of the computers are on macOS 10.14.6. The issues occur on a MBP11,1 and MB8,1. They do not occur with an MBA2,1 (which has been persuaded to run 10.14.6 despite it being unsupported) and a "hackintosh".
Any ideas?
Shanti