I’d like to help everyone to a smooth, prepared and successful upgrade.
When was the last time you performed a Time Machine backup?
Do you make bootable backups?
Have you ever used a backup to restore my system?
Do you have a list on paper of the apps you consider deal breakers? (i.e. If Microsoft Word and Evernote and Dropbox do not work and work well, I will erase my Mac and reinstall the older OS until those programs get updates or I can find an alternative.)
How much storage space does your Mac use today and how much space is available on your backup drive? …