Setting->General->Storage->System Data never completes ‘calculating'

lkrupp wrote:

I’ve been experiencing this issue for the last two versions of macOS and it continues with Tahoe. There have numerous reports and just as many suggestions for resolution. One suggestion was to logout of one’s Apple Account then log back in. That worked... for a few days. Another suggestion was to dismount all connected external drives... didn’t work.

Something about my installation is hanging System Data calculating and I don’t have a clue what.

This is an issue often reported with no clear resolve— so don't feel alone.

submit your Apple Feedback here: Product Feedback - Apple

I saw that on my M4 Pro MBP with Sequoia, I was sort of hoping it would resolve itself with Tahoe but I haven't checked yet. My M1 Pro MBP still on Sequoia reports a size for System Data. As leroydouglas states, you're not alone.