On Aug 13, 2018, at 8:06 PM, James Walker <list2@...> wrote:

It's not a sheet, just a window being operated with -[NSApplication runModalForWindow:].

I forget the tweak to do this -- I think it has something to do with using your own run loop.

I'm pretty sure I've done what you describe. If I can find how I'll post it here, but maybe the run loop hint will help you find it.

--Andy