Cross-platform data cleanup is one of those things that sounds simple until you're actually doing it. Our team runs a mix of Macs and Windows machines, and every time someone exports a CSV from our inventory system it comes back bloated with duplicate entries. The frustrating part isn't the duplicates themselves — it's that whatever tool one person uses on Windows doesn't work the same way on Mac, so we end up with inconsistent results depending on who cleaned the file.

I went looking for something that worked identically on both platforms and stumbled onto this guide covering how to remove duplicates from a CSV file  on Mac and Windows. It's one of the more thorough walkthroughs I've found — covers the manual routes honestly, including where they fall apart, which for us was anything above a few hundred rows or any file with partial duplicates rather than exact matches.

The tool we landed on was the MacSonik CSV Duplicate Remover , and it runs the same way on both OS without any fiddling. You load the file, pick the columns you want to match against, preview what's flagged, then remove. The whole thing on a 15,000-row file took maybe two minutes. Our Mac users and Windows users are now getting identical output from the same process, which was the actual problem we needed to solve.

If your team is split across operating systems and CSV cleanup is eating time, this is the straightforward fix. No scripting, no compatibility headaches, just clean data.