since for Mac

since is a small command-line utility for checking what has changed in a file since the last inspection. It watches a file like tail does, but remembers the position where you last stopped reading, so the next run shows only the newly added content and saves you the trouble of searching through the file again. It suits users who frequently follow logs, monitor output, or track updates to long files, and is especially handy in situations where you repeatedly need to confirm "what was added during this period." The tool focuses on making "stateful tail viewing" simple, without pursuing complex features, and is a lightweight choice for people accustomed to working in the terminal.