Thank you very much for the swift response, I will!

Hi and thank you for your comprehensive response. I added fflush(stdout) after my printf statements and that resolved it, so I believe you were right about the buffering being the culprit here. Are there any downsides to using fflush(stdout) I'm unaware of vs. setting the STDBUF environment variable? Thanks again!

I can't tell you what the reason is but it resolved itself after a while for me. I'm assuming iCloud finished syncing something and some deadlock between Xcode and iCloud was lifted afterwards but I can't be sure.