macbook air Photo editing malfunctioning
I am having problems with Photos on my MacBook air, following latest update (10.13.5). I can no longer duplicate a photo but a more longstanding difficulty has been using Retouch. Manual source point brings up unrecognisable shapes. When I ctrl click, the message "Clear manual Retouch source point" is not highlighted, so is inoperative. What, if anything, can I do?
MacBook Air (13-inch, Early 2015), iOS 10, Photos