Mac install - Unsigned Developers app
[since OS 10.12] - write in the app "Terminal" : sudo spctl --master-disable
[since OS 10.12] - then press enter to see the "Anywere" option
[since OS 10.12] - (enter OS password if asked)
- Go to System Preferences > Security & Privacy > General
- Click the lock in the bottom left of window
- Under "Accept Applications Downloaded from" heading Click the button "Anywhere"
- Open TexTuring