How to force Photos to release space for an iCloud backed library?

I have migrated my 200 gigabyte Photos library to iCloud on my Mac. Works very well.

I then created a new, empty library on the Mac and let Photos copy the whole iCloud contents locally on the Mac. Now I need the space locally, so I would like Photos to undo the local copying only leaving the preview image locally and release say 150 Gb of the 200. Clicking the “Optimize Mac-storage” radio button in preferences (and waiting days while having About this Mac -> System report -> Storage administration open) does not do this.

Is there a way to trigger this process? Is the only way to delete my current library, create a new empty library on the Mac, and let it populate?


Source : Link , Question Author : Thorbjørn Ravn Andersen , Answer Author : Community

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