I have been using Lightroom for years back to LR5. Ive run into the issue when I merged 7 catalogs to 1. The sum of the smart previews was roughly 95gb. Once the merge was complete my Mac was only reporting it as 27gb despite actually being roughly 95gb as reported by Omni Disk Sweeper. So I deleted and rebuilt the smart preview library. after completion it reported the 95gb. Then I went through and deleted 700+ photos. In finder the file size did not change. When I check the smart preview size within Lightroom it reports 90gb. Is this a Lightroom or macOS issue?