What can you do to investigate when an app suddenly vanishes in an ‘unexpected quit’? How to read the log and the crash log.
ReportCrash
It’s no longer Crash Reporter, but Problem Reporter; how to get notifications instead of the default modal dialog; how to read and use crash logs.
Whenever the bug occurred, it set the screen into a steady roll. The only way out was to pull down a menu command, no mean feat when pointer, menu bar and the whole caboodle are rolling past your eyes.
The Eclectic Light Company 