It started for me after installing High Sierra. A file worked on and saved several times before the installation - with no problems. I just tried a "save as" for same file with same name, and have changed it 3 times since then without repeat of the problem. No guarantees but worked for me.
It started for me after installing High Sierra. A file worked on and saved several times before the installation - with no problems. I just tried a "save as" for same file with same name, and have changed it 3 times since then without repeat of the problem. No guarantees but worked for me.