On Mac, PyFerret seems enable to use an other window than window 1. SET WINDOW/NEW or SET WINDOW 2 crash : SET WINDOW/NEW objc[77534]: +[__NSPlaceholderDate initialize] may have been in progress in another thread when fork() was called. objc[77534]: +[__NSPlaceholderDate initialize] may have been in progress in another thread when fork() was called. We cannot safely call it or ignore it in the fork() child process. Crashing instead. Set a breakpoint on objc_initializeAfterForkError to debug. Tested with PyFerret 7.4 on Mac OS X Sierra, with python 3.7 and PyQt from HomeBrew Olivier -- Laboratoire des Sciences du Climat et de l'Environnement Institut Pierre Simon Laplace Laboratoire CEA-CNRS-UVSQ - UMR 8212 Tel : +33 1 69 08 77 27 - Mob : +33 6 45 36 43 74 Fax : +33 1 69 08 30 73 |