Upgraded to 10.13 and lost all the reminders I had entered. EVERYTHING! Can I recover this information?
iMac, macOS High Sierra (10.13.1), Upgrade hell - AGAIN.
If you are using only web mail account , and you download the OS ( make sure did not cleaned the hard drive and downloaded from App Store ) you can recover the reminders from time machine an article How to use Time Machine to back up or restore your Mac - Apple Support
I never used iCloud. I wasn't on iCloud, and I don't want to use iCloud. I just downloaded the new OS software. Just for laughs I tried to correct using the method you described, but as I suspected there was no data on iCloud to restore, so the programs remain blank. I had entered all my data on these applications. The "upgrade" simply wiped Calendars and Reminders clean. My Contacts are still there, it appears to just be Calendar and Reminder that have been scrubbed of all the information I have collected and used since three iMacs ago, nearly 10 years worth of information. Birthdays, special events, deaths, appointments. Is there some other way to gain back what was taken?
See these articles If you accidentally deleted iCloud reminders - Apple Support
Click on the link in bottom also .
reminders
