Odpowiadam sam sobie: na stronie producenta ON1 Photo pojawiła się informacja, że:
Quote
The following programs have been tested and are supported on the latest Mac OS Sierra:ON1 Photo 10.5
ON1 Enhance 10.5
ON1 Layers 10.5
ON1 Portrait 10.5
ON1 Resize 10.5
ON1 Browse 10.5
ON1 Effects 10.5
The new Photo RAW application (scheduled to be released in mid November 2016) will also be supported on Mac OS Sierra.