I am continually prompted to sign into an apple account that I haven't used for years and was as far as I remember deleted. When I run a sysdiag and trawl the logs and text files it looks like a calendar issue. 06/08/26 22:41:57.218995 pid=96 handle_set_value: accountsd attempting to set [com.apple.mobile.data_sync]:[Calendars] to [{ AccountNames = ( Live, Hotmail, "hotmail.co.uk", "unusedappleid @ live.co.uk" ); Sources = ( iCloud ); I've raised a bug report for it but wondered if anyone else had encountered the issue.