In Mac OSX, Visual Studio Mac version can not running NScrapy in Debug mode

[xboxeer]

Running in Debug mode will hang in Dequeue in RequestReceiver, not sure why this happened

[xboxeer]

Looks like that this is because Mac(or Unix like system) uses different way to handle process/thread
Windows threads belong to its parent process, if the main process exit, all its child threads would be terminated and the program would exit as well, so in windows version of NScrapy there is a while(true) at the end of the Spider.Crawl method
However Mac(Or unix like system) does not act that way, thread in Mac is actually a process, the while(true) blocks the main process, all the thread created by it also got blocked, so RequestReceiver(an individual thread to get response from spider) won't be able to handle(dequeue) request by that time
Need a further research against the difference between windows/unix