Remove photos from Mac SSD but keep in iCloud
I've just installed Catalina on my work computer and noticed that it has slowly just filled my drive with all my iCloud photos! Now how do I get them off again without wiping the originals in iCloud? in system prefs under Apple ID I have unchecked Photos and Optimise Mac Storage is ticked. But it's only freed up 150Gb out of the 700Gb it took. And every so often I can see it going down again. I need the space for exporting work from After Effects and its cancelling out my exports saying that there's not enough storage.