just a plain macos desktop, latest sequoia. no clusters or anything complex. when I ^c out of it, a `traceback()` on macos tells me that ``` [highest number]: selectChildren(ac[!fin], -1) [-1]: mclapply(... ``` I don't know what selectChildren is waiting for (internal? macos?), but it certainly is patient. I wonder whether others have encounted similar problems on occasion. it's not a huge deal, but it would be nice to stop...unstop.