PokerTracker

In the past I used a disc cleaning utility and it completely messed up the my hand database. Support said this was not unusual and had a long list of ways to get it back but it was a relatively new database and I just started over. My mac is slowing down a lot (old MacBook air with a M1 chip) and I would like to use a disc cleaning program again but I don't remember which one I used last time that destroyed my database. Does anybody have any experience using one and which one did you use that didn't destroy the hand history and database?

Thanks

If you are going to be using a tool like that then there is the potential for it to corrupt your PostgreSQL data. As a precaution you can backup your database before using any disk cleaning tool:

Guide: Backup & Restore

Also you should be able to configure the cleanup tool to exclude PostgreSQL so it should not touch database files:

/Library/PostgreSQL/[version]/data

For general Mac performance, macOS is usually quite good at managing its own storage, and third-party cleaners often cause more problems than they solve. You may get better results simply by manually freeing up disk space.