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X Plane 64 bit ver 10 on OS X (latest).Runs fine, but the Apple crash dialog pops up each time I Quit X Plane.X-Plane does not quit gracefully.
Log.txt attached.
You did not include a copy of your log.txt from one of these occasions, so I don't know any specifics. My initial guess might be that the plane you are using has issues with SASL. Please see this article for more information and troubleshooting if that is the case.
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