Every time I have tried to upgrade to 10.1.6, the program fouls up in my computer, necessitating work to get Accordance to work again. And I don't have 10.1.6. The last time I tried the upgrade, the announcement came on screen that I had downloaded it. But when I went to install, the install window froze. Then when I tried to activate the program, the computer put on a window saying that because Accordance was corrupt, I could not open the program; then the icon disappeared from the Dashboard. After searching with the (miserable) Spotlight, I found was able to open 10.1.5.