I am in a "not Mac friendly" company, so I am on my own, without support from the IT department...
On OS X Snow Leopard (10.6.8), when I tried to upgrade from a Notes 7.0.3 setup to 8.5.3, I encountered a crash whenever I launched the 8.5.3 client.
I was forced to revert to 7.0.3 from a backup...
I have some NotesDynConfig....crash and some nsd_Darwin....log files available (one set corresponding to my usual config, another with OS X relaunched in "safe mode").
Notes Client 8.5.3 crash on OS X (Barijaona Ramah... 5.Mar.12)
Feedback number WEBB8S4DLR created by Barijaona Ramaholimihaso on 03/05/2012
. . Reinstall, don't upgrade. (Simon O'Doherty... 5.Mar.12)
. . . . Thanks for your help (Barijaona Ramah... 5.Mar.12)