I have now tried RT ver 5.3-577-g6567380f, and the same happened as reported in Processing Queue https://discuss.pixls.us/t/processing-queue/6647:
After clicking the little icon that should move the image in the Editor to the processing queue, nothing happens, ie there is no number shown in the processing queue tab, and if I click that, RT crashes. It was the same with another raw file I tried, so it does not seem to be specific for the particular raw file I tried first.
I tried to identify the RT version via the prefs. When I hovered the mouse pointer over the little icon at bottom left, the ‘Preferences’ popup appeared, but the prefs did not open, not upon double-clicking either.
When I tried to exit RT by closing the window by clicking the x icon at top left, nothing happened, and I had to force quit.
So I think I go back to version 4 for now.
MacOS 10.11.6, MacPro early 2009, 2,66 GHz Quad-Core Intel Xeon processor, 24 GB RAM 1066MHz-DDR3 EEC.
Thank you for your work!