2016-09-18 15:26 GMT+02:00 Hilaire <hilaire@drgeo.eu>:

I guess you meant SpecDebugger.
I can alt+., but at the end I have to kill Pharo from the system.

Enclosed the .log file.
I don't know why there is lot of noise in the debug log, it is hard to
understand what is going on.

Hilaire. In lastest Pharo we investigate why process interruption with cmd+. is not working sometime.��

Main reason was that system write stack to file before opening debugger. And it could be really slow which will delay debugger for the long time.

That's why I suggest disable logging. In my cases it makes cmd+. works well.