Ah! Thanks for pointing that out. That's the piece I forgot about here. iTerm is populating the system clipboard from tmux because of the tmux integration [1].

Ah! Thanks for pointing that out. That's the piece I forgot about here. iTerm is populating the system clipboard from tmux because of the tmux integration [1]. [1] https://iterm2.com/documentation-tmux-integration.html https://iterm2.com/documentation-tmux-integration.html