Everything’s updated. Performance seems the same. Digging into the files project seems duplicated x3, no idea why, but honestly don’t think it’s worth the effort. Clear coat was broken for almost a year in Mac and nobody seemed to care about it, not when it was broken and not even when it was randomly fixed in 5.3, so whatever.
For reference this is my original post MacOS 5.3 build is 300% larger than 5.1? - Development / Platform & Builds - Epic Developer Community Forums (unrealengine.com)