like the other guys said, 1) use a alarm clock, 2) there's a freaking calendar app builtin. but if you really need to "code" for whatever reason. The core logi

like the other guys said, 1) use a alarm clock, 2) there's a freaking calendar app builtin. but if you really need to "code" for whatever reason. The core logic is trivially simple. you need to 1) wait til the moment you want to wake up 2) generate some noise. so just open mac terminal and type: sleep 28800; while true; do say "wake up"; done