When Krita is not running, go in finder and double click a kra file. Krita will crash on splash screen and the os will propose to reopen. Click reopen, krita opens correctly This has appeared with https://bugs.kde.org/show_bug.cgi?id=417312#add_comment git hash: 9dffafb
Ivan, I'm assigning to you.
*** This bug has been marked as a duplicate of bug 421448 ***