https://bugs.winehq.org/show_bug.cgi?id=30148
--- Comment #26 from julusp@gmail.com --- As this is not entirely wine issue, but rather how (badly) the OSX handles the memory allocations when mapping is private, I don't believe this can be easily solved in wine code.
As this is not the wine bug, please close it as upstream/notourbug.
Note: I've already open a bug report with a reproducer code to apple couple years ago, clearly demonstrating this issue, which has been closed as duplicate.