Juicy Box
macrumors 604
Is this on the HDD or SSD?I upgraded to High Sierra yesterday.
Right after installing the OS, indexing takes place, and your boot drive might have a significant performance loss.The Finder has been sluggish, but it's getting better. I don't regret the choice.
Indexing usually takes a few hours to a few days to fully complete. Performance will progressively improve as indexing progresses.