Hi. Before anything. forgive my English .. I have two complete copies of X-Plane. One that I run from an external drive "E" and another run from "C". I use mac. 10.9 mavericks. Still I could not prove it 100% but I think the problem I was having when I run the copy from the external drive. Today I made a flight with the copy that is in "C" and has not expelled me, I've also changed aircraft, previously used A320 neo Jar design and the last I've done with payware Boeing 727 series. I get checks to do. Ire telling what happened ... Thanks!