Just in case I get Finder at 100% of one CPU core again while Time Machine is performing “Preparing backup…” for > 6 hours, I might take another look at these links:
- “time machine” “preparing backup” “finder” “cpu usage” – Google Search
- [WayBack] Time machine is stuck on preparing backup… – Apple Community
- [WayBack] High Sierra – Time Machine on “Prepar… – Apple Community
- [WayBack] Time machine stuck on preparing for back … – Apple Community
- [WayBack] How far is my Time Machine “preparing backup” step? – Ask Different
- On removing the “in progress file” (and sometimes rebooting):
This did not reveal much interesting back then:
clear; printf '\e[3J' && log show --predicate 'subsystem == "com.apple.TimeMachine"' --info --last 24h | grep -F 'eMac' | grep -Fv 'etat' | awk -F']' '{print substr($0,1,19), $NF}'
I was at Mac OS 10.3 High Sierra back then with 4 TB external backup disks backing up from the internal 1TB PCIe NVMe.
–jeroen
