Pablo Galindo Salgado <pablogsal@gmail.com> added the comment: multiprocessing.Pool.imap hangs in MacOs after applying this commit: import multiprocessing def the_test(): print("Begin") for x in multiprocessing.Pool().imap(int, ["4", "3"]): print(x) print("End") the_test() This also happens in the backported branches. ---------- nosy: +pablogsal status: closed -> open _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue34172> _______________________________________